Process & Material
Titanium Grade 23 Sinker EDM Feasibility Review
Titanium Grade 23 can be machined with Sinker EDM when the geometry matches blind cavities, ribs, shaped pockets, mold details, deep forms, and internal geometry that a traveling wire cannot reach. Titanium Grade 23 is an extra-low-interstitial Ti-6Al-4V grade used where toughness, fatigue and medical cleanliness are important; the supplied condition affects support, discharge energy, finishing, and inspection.
Quick Answer
Sinker EDM is suitable for Titanium Grade 23 when the feature is a blind cavity, rib, pocket, or internal form that a shaped electrode can reach from one side. The supplied condition must be stated before tolerance and surface requirements are confirmed.
Key Material Decisions
How This Material Behaves
An extra-low-interstitial Ti-6Al-4V grade used where toughness, fatigue and medical cleanliness are important. In Sinker EDM, the supplied condition changes electrode wear, cavity-floor consistency, corner growth, and the finishing strategy—especially on deep ribs and textured surfaces.
Choosing the Right Condition
Choose Sinker EDM for blind cavities, ribs, shaped pockets, mold details, deep forms, and internal geometry that a traveling wire cannot reach. State the exact Titanium Grade 23 condition, then set tolerance, finish, support, and inspection from the controlled feature rather than the whole part.
Risks to Manage
For Sinker EDM, Medical or fatigue-critical surfaces require traceable finishing, cleaning and recast control. Where debris collects at a cavity root or sharp internal corner, debris retention and electrode wear can change the root, wall and floor at different rates, with the highest consequence at medical, fatigue and corrosion-critical titanium surfaces. The Titanium Grade 23 feature may therefore show a dimensionally acceptable cavity with thermally damaged floors or corners. For Titanium Grade 23, use clean low-energy finishing and specify whether recast removal, polishing or validated cleaning is required. Compare the roughing electrode, finish electrode and final cavity rather than relying on nominal electrode size; document geometry, recast, contamination and the named medical, fatigue or corrosion face for Titanium Grade 23.
How Sinker EDM Works on Titanium Grade 23
Sinker EDM reproduces a shaped electrode as a blind cavity in Titanium Grade 23. Electrode material, wear, orbit, pulse energy and debris evacuation control wall size, floor depth, corner definition and surface condition. Where final size or texture is critical, roughing and finishing electrodes should be planned as separate operations.
Sinker EDM Capability Reference
| What you're asking | What you can expect |
|---|---|
| Feature types | blind cavities, ribs, shaped pockets, mold details, deep forms, and internal geometry that a traveling wire cannot reach |
| Tolerance | ±0.008–0.030 mm |
| Surface finish | Ra 0.2–6.3 μm |
| Electrode choice | Graphite or copper selected from cavity, finish, and wear needs |
| Primary cavity limit | Depth, rib width, access, and debris evacuation |
| Main limitation | Electrode access and debris evacuation limit deep, narrow blind geometry. |
Material Condition Reference
| Condition | What to expect | Watch out for | Surface notes |
|---|---|---|---|
| annealed | Use stable support and low-energy finishing. | Thermal surface effects can reduce fatigue resistance. | Specify recast and edge condition on fatigue and medical faces. |
| stress-relieved | Plan around stress relief and thin-wall movement. | Residual stress can distort delicate profiles. | Use trim passes and controlled post-processing on critical faces. |
How This Material Behaves
Titanium Grade 23 is extra-low-interstitial Ti-6Al-4V used where toughness and fatigue performance are tightly controlled. In EDM, this means a contaminated or cracked recast layer can negate the benefit of the ELI grade even when roughness is acceptable. Use clean finishing conditions, leave allowance for surface removal where required, and verify fatigue-critical faces by metallography. For Sinker EDM, Medical or fatigue-critical surfaces require traceable finishing, cleaning and recast control. In blind cavities, trapped debris and repeated heating can increase recast and microcrack risk at floors and sharp corners.
Surface Integrity and Post-Process
For Sinker EDM on Titanium Grade 23, use low-energy finishing and define whether recast removal, polishing or passivation is required. Use roughing and finishing electrodes separately where cavity size or texture is controlled. Apply polishing, lapping or recast removal only to named functional faces, and inspect wall, floor and corner condition after the final surface operation.
Titanium Grade 23 Sinker EDM Checkpoints
- Confirm that the feature matches blind cavities, ribs, shaped pockets, mold details, deep forms, and internal geometry that a traveling wire cannot reach.
- State the supplied condition: annealed and stress-relieved.
- Mark the controlled dimensions, functional surfaces, datum scheme, and inspection method.
Typical Parts and Features
- medical components
- aerospace profiles
- lightweight fixtures
- mold cavities
- blind pockets
- deep ribs
Limits and Better Alternatives
Main Limit
Electrode access and debris evacuation limit deep, narrow blind geometry. On Titanium Grade 23, surface integrity and traceable post-processing matter more than a generic titanium finish claim; the supplied condition still controls support, finishing, and surface-integrity review.
Consider Another Route When
Use Wire EDM for through profiles, CNC machining for open cavities with tool access, or grinding for simple flat precision surfaces.
Practical Next Step
Send the Titanium Grade 23 drawing with condition, controlled geometry, tolerance, functional surface callouts, quantity, and inspection requirements. If the route is unclear, we will compare Sinker EDM with the adjacent EDM or conventional process.
Practical Takeaway
Titanium Grade 23 is compatible with Sinker EDM when the feature matches the process access. The supplied condition determines support, finishing, surface control, and inspection.
Additional Project Information
Include application, destination and end-use notes together with the material, quantity and drawing requirements.
Project Details for Technical Review
Include application and end-use notes when they affect material, inspection, documentation, or export review.
- Process: Sinker EDM
- Material: Titanium Grade 23
- Drawing or part sketch
- Material grade
- Thickness / part size
- Quantity
- Tolerance and critical dimensions
- Surface finish or inspection requirement
STEP/STP, DXF, DWG, PDF, IGS/IGES or ZIP.
Confidential drawing review. NDA support available on request.
Frequently Asked Questions
Can Titanium Grade 23 be machined with Sinker EDM?
Yes, when the feature is a blind cavity, rib, pocket, or internal form that a shaped electrode can reach from one side. Titanium Grade 23 is electrically conductive and the final route follows the feature geometry and supplied condition.
What controls Sinker EDM on Titanium Grade 23?
The main process controls are electrode material, wear compensation, cavity depth, rib width, orbit strategy, debris evacuation, and rough-versus-finish electrodes. The Titanium Grade 23 condition adds dimensional-stability and surface-integrity requirements.
What is the main risk?
For Sinker EDM, Medical or fatigue-critical surfaces require traceable finishing, cleaning and recast control. Where debris collects at a cavity root or sharp internal corner, debris retention and electrode wear can change the root, wall and floor at different rates, with the highest consequence at medical, fatigue and corrosion-critical titanium surfaces. The Titanium Grade 23 feature may therefore show a dimensionally acceptable cavity with thermally damaged floors or corners. For Titanium Grade 23, use clean low-energy finishing and specify whether recast removal, polishing or validated cleaning is required. Compare the roughing electrode, finish electrode and final cavity rather than relying on nominal electrode size; document geometry, recast, contamination and the named medical, fatigue or corrosion face for Titanium Grade 23.
What should I send for review?
Send the drawing, exact Titanium Grade 23 condition, controlled geometry, tolerance, functional surface requirements, quantity, and inspection expectations. If any item is undecided, send what you have and we will help complete the review.