Material Certification Guide for Titanium Parts
Neutral buyer guide to material certifications for titanium parts — MTR, COA, COC — and what each document verifies.
Quick Answer
Material certifications verify that titanium parts and material meet the agreed standard. The key documents are the Mill Test Report (MTR), Certificate of Analysis (COA), and Certificate of Compliance (COC); the MTR is the most comprehensive.
Checklist
- Confirm which certification document(s) the purchase requires
- Verify the document references the correct grade and standard
- Check the document against the agreed chemistry and properties
- Confirm lot and heat traceability
- Keep certifications with the lot for audit
Documents prove conformity
Buyers use certifications to verify that what was shipped matches what was specified. The required document depends on the standard and the buyer’s quality system.
KEEP THE GAP
Document requirements vary with standard and industry. Refer to the governing standard for what each certificate must contain. titanium.blog does not issue certifications.