Surface Finishing for Titanium Grade 5 (Ti-6Al-4V)

Titanium naturally forms a protective oxide layer, but surface treatments can enhance performance. Anodizing provides colors, PVD adds wear resistance, and shot peening improves fatigue life.

Recommended Machining Parameters

ParameterValue
Achievable Tolerances±0.01 mm (finished)
Surface FinishRa 0.4-3.2 μm
Cutting SpeedN/A
Feed RateN/A
Tooling RecommendationsN/A — surface finishing process

Expert Machining Tips

1

Type II anodize for colored identification coding

2

PVD (TiN, TiAlN) for wear resistance

3

Shot peen for fatigue life improvement (compressive stress)

4

Passivation removes free iron contamination

Common Parts Made

Anodized aerospace fasteners

PVD-coated surgical instruments

Shot-peened structural parts

Machining Challenges

  • Titanium anodize is different from aluminum anodize
  • PVD coating temperature must not degrade Ti properties
  • Color anodize for identification, not protection

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