Titanium Grade 1 (CP4) is the softest, most ductile, and most corrosion-resistant of all commercially pure titanium grades. Its very low oxygen and iron content gives it exceptional formability, toughness, and resistance to aggressive chemical environments.
Material Classification
| UNS | R50250 |
|---|---|
| ASTM Standards | B265, B348, B381 |
| Alloy Type | Commercially Pure (Alpha Titanium) |
| Strength Level | Lowest among CP grades |
| Ductility | Highest among all titanium grades |
Corrosion Resistance
Titanium Grade 1 offers exceptional corrosion resistance, among the best of all titanium grades. It forms a self-healing titanium oxide (TiO₂) passive layer, even in aggressive environments.
✔ Seawater & marine atmospheres
✔ Chloride solutions
✔ Nitric and oxidizing acids
✔ Industrial chemical environments
Applications
Chemical & Process Industry: Heat exchanger tubes, condensers, reactors, storage tanks
Marine & Desalination: Seawater piping, desalination plants, marine heat exchangers
Power & Energy: Condenser tubing, cooling water systems
Medical & Biomedical: Medical foils, surgical instruments, biocompatible components
Industrial & Architectural: Bellows, expansion joints, cladding panels
Advantages
✔ Best-in-class corrosion resistance
✔ Exceptional ductility and deep formability
✔ Excellent weldability and fabrication ease
✔ Lightweight, non-magnetic material
✔ Outstanding biocompatibility
Limitations
⚠ Lowest strength among titanium grades
⚠ Not suitable for load-bearing structures
⚠ Poor wear resistance without surface treatment
CP Titanium Grade Comparison
| Grade | Strength | Ductility | Typical Use |
|---|---|---|---|
| Grade 1 | Low | Excellent | Deep forming, corrosion service |
| Grade 2 | Medium | Very Good | General purpose |
| Grade 3 | High | Moderate | Structural CP applications |
| Grade 4 | Highest | Good | Medical, fasteners |
Summary:
Titanium CP4 – Grade 1 is the most ductile and corrosion-resistant commercially
pure titanium grade. While it has the lowest strength, it excels in chemical
processing, marine systems, heat exchangers, and deeply formed components,
offering unmatched durability, fabricability, and service life.