Technical guide · 2026-08-14
Commercially Pure Titanium
Commercially pure titanium Grades 1–4 are corrosion-led alpha materials whose oxygen content progressively raises strength while reducing ductility and formability, making grade and product specification inseparable.
01
Definition and boundary
Includes unalloyed titanium grades and palladium-modified variants only when explicitly specified; excludes Ti-6Al-4V and other intentionally strengthened alloy systems.
Reference information only: final acceptance is controlled by the ordered product specification, condition, dimensions and certified test results.
02
How the material system works
Stable alpha structure supports weldability and corrosion resistance.
Oxygen strengthens interstitially while reducing forming margin.
Surface contamination during heating can create brittle alpha case.
03
Representative grades and systems
| Grade or system | Selection focus | Qualification |
|---|---|---|
| Grade 1 / UNS R50250 | Lowest-strength, highest-formability CP grade. | Confirm the governing product specification, delivery condition, section size and acceptance tests before treating designations as interchangeable. |
| Grade 2 / UNS R50400 | Common corrosion-service balance. | Confirm the governing product specification, delivery condition, section size and acceptance tests before treating designations as interchangeable. |
| Grade 4 / UNS R50700 | Higher-strength CP grade with lower ductility. | Confirm the governing product specification, delivery condition, section size and acceptance tests before treating designations as interchangeable. |
04
Properties and trade-offs
Aqueous corrosion resistance
Cold formability by grade
Welded-condition performance
05
Product forms and supply conditions
06
Applications and selection
Applications and selection
- Heat exchangers
- Chemical vessels
- Marine piping and anodes
Properties and trade-offs
- Choose oxygen-strength level around forming severity.
- Add Pd-bearing grade only for demonstrated corrosion need.
- Check hydrogen pickup and crevice conditions.
07
Fabrication, durability and inspection
Use clean dedicated tooling.
Shield welds until below oxidation-sensitive temperature.
Remove alpha case after hot processing when required.
08
Procurement checklist
- Report O, N, H, Fe and residual chemistry.
- State annealed condition and bend/form requirements.
- Define surface finish, weld qualification and corrosion test if needed.
09
Standards, sources and review
Standards and designation context
- Applicable ASTM B10 titanium product specification
- Buyer drawing and approved material condition
- Qualified inspection and certification plan