Titanium Grade 2 is the most widely used of the commercially pure titanium alloys. It offers a balance of strength, corrosion resistance and formability, and is particularly popular in the chemical process industry, marine engineering, medical technology and energy. It is slightly stronger than Grade 1 but retains excellent weldability and biocompatibility.
The recommended filler material for welding is titanium AWS A5.16-90 ERTi-2.
General material description:
Type: Commercially pure titanium (minimum 98.9–99.7% Ti), slightly stronger than Grade 1
Structure: HCP (hexagonal close-packed) structure
Developed for: Demanding environments where corrosion resistance, low weight and reliability are crucial
Alternative names: Titanium Grade 2, CP Titanium Grade 2, UNS R50400, Werkstoffnr 3.7035, ASTM B265
Key benefits:
Very good corrosion resistance in seawater, chlorides and acids
Better strength than Grade 1 (without sacrificing formability)
Exceptional weldability and biocompatibility
Low weight (approx. 4.51 g/cm³) – ideal for pressure vessels and heat exchangers
Good toughness and durability at low temperatures
Disadvantages / Limitations:
Not hardenable by heat treatment
Lower strength than alloyed titanium grades (e.g. Grade 5 / Ti-6Al-4V)
Not ideal for applications with high mechanical requirements combined with high temperature
Applications by industry and value:
Chemical industry: Tanks, pipes, heat exchangers – acid resistance + low weight
Marine/offshore: Hull parts, heat exchangers – seawater resistance
Energy / Power plants: Condensers, shell materials – low CTE + corrosion resistance
Medicine / Biotechnology: Implants, surgical devices – biocompatibility
Air conditioning / HVAC: Titanium pipes in chlorinated systems – durability
General corrosion description:
Stable and dense oxide film protects against a wide range of corrosive environments
Resists chlorides, acids (oxidizing), seawater and hydrogen peroxide
Not susceptible to stress corrosion cracking in most commercial fluids
Corrosion environments where the material performs well:
Seawater (both static and flowing)
Hydrochloric acid (diluted), sulfuric acid, phosphoric acid – at moderate temperatures
Chloride solutions, chlorinated water
Organic acids, hydrogen peroxide
Corrosion environments where the material should be avoided:
Hydrofluoric acid (HF) – attacks the oxide film
Concentrated sulfuric acid at high temperatures
Reductive acids at high temperatures without oxygen supply
Technical material properties (annealed condition):
Property (Typical value)
Yield strength (0.2%): ~275–350 MPa
Tensile strength: ~345–485 MPa
Elongation at break: ~20–30%
Density: ~4.51 g/cm³
Elastic modulus: ~105 GPa
Thermal conductivity: ~17 W/m·K
Usage temperature: Rec. ≤ 300°C (temporarily up to 425°C)
Weldability: Very good – not prone to cracking
Machinability: Good – but requires sharp tools and good cooling