Titanium Grade 2 is the most widely used commercially pure (CP) titanium grade. It is often referred to as the “workhorse” of titanium, offering the best overall balance of strength, corrosion resistance, ductility, weldability, and cost among all CP grades.
Grade 2 is commonly selected for industrial, marine, chemical, and power-generation applications where long service life and reliability are critical.
Alloy Identification
| Standard | Designation |
|---|---|
| UNS | R50400 |
| ASTM | B265, B348, B381 |
| Alloy Type | Commercially Pure (Alpha Titanium) |
| Strength Level | Medium (between Grade 1 and Grade 4) |
Metallurgical Behavior & Strengthening
Titanium CP Grade 2 is not heat-treatable. Strength is achieved through:
✔ Oxygen solid-solution strengthening
✔ Cold working during fabrication
Metallurgical characteristics include:
✔ Single-phase alpha titanium structure
✔ Excellent resistance to stress corrosion cracking
✔ Stable microstructure across temperature ranges
✔ Good resistance to hydrogen embrittlement
Corrosion Resistance
Titanium Grade 2 offers outstanding corrosion resistance in a wide range of industrial and marine environments.
✔ Seawater and marine atmospheres
✔ Chloride-containing solutions
✔ Nitric acid and oxidizing chemicals
✔ Industrial and atmospheric pollutants
A stable, self-healing TiO₂ passive oxide layer provides long-term protection even in aggressive service conditions.
Typical Applications
Chemical & Process Industry
Heat exchangers, condensers, reactors, chemical storage tanks, piping systems
Marine & Offshore
Seawater piping, marine heat exchangers, desalination plants
Power & Energy
Condenser tubing, cooling water systems, power plant components
Aerospace & Industrial
Aircraft ducting, hydraulic tubing, fasteners, structural industrial components
Medical
Surgical instruments, medical device components
Limitations
⚠ Lower strength than alloyed titanium (Grade 5 / Grade 23)
⚠ Not suitable for high-load structural aerospace applications
⚠ Wear resistance is limited without surface treatment
Comparison – CP Titanium Grades
| Grade | Strength | Ductility | Typical Use |
|---|---|---|---|
| Grade 1 | Low | Excellent | Deep forming |
| Grade 2 | Medium | Very Good | General purpose |
| Grade 3 | High | Moderate | Structural CP |
| Grade 4 | Highest | Good | Medical, fasteners |
Why Choose Titanium CP Grade 2?
✔ Reliable corrosion resistance
✔ Moderate strength with excellent ductility
✔ Superior weldability and fabrication ease
✔ Cost-effective titanium solution
✔ Long service life in marine and chemical environments
Titanium CP Grade 2 is often the first and safest choice for most titanium applications, delivering unmatched versatility and proven performance across industries.