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Titanium

Ti Grade 2 (CP)

Ti Grade 2 is commercially pure (CP) titanium, the most widely used unalloyed grade. It trades the high strength of Grade 5 (485 vs 1000 MPa tensile) for far better formability (20% elongation) and somewhat easier machining. It keeps titanium's top corrosion resistance (5/5) at lower cost, making it the go-to for corrosion-driven, formed parts.

How Ti Grade 2 (CP) machines

At 2/5 it's better than Grade 5 but still demanding. The same low thermal conductivity (17 W/m·K, still poor) traps heat at the edge, so use low speeds, sharp tools, rigid setups, and flood coolant. Being softer and more ductile, it tends to gall and produce stringy chips rather than wearing tools as fast as the alloy.

Manufacturing & processing

Suits CNC machining and sheet-metal forming, it's notably more formable than Grade 5 and bends and deep-draws well. Readily weldable by TIG under inert shielding; protect the hot metal from oxygen and nitrogen pickup. Not heat-treatable for strength (single-phase alpha). Anodize or passivate for finish. Watch chip fires as with all titanium.

Typical applications

Chemical-processing equipment, heat exchangers, and condenser tubing; marine and desalination hardware; architectural cladding; medical and dental components; cryogenic and pressure-vessel parts. Chosen where titanium's corrosion immunity is needed in formed, welded, or sheet geometries that don't require Grade 5 strength.

When to choose it

Choose CP Grade 2 when you need titanium's corrosion resistance plus formability or weldability and don't need high strength. If the part is highly loaded or strength-to-weight critical, use Grade 5 instead. If corrosion isn't the driver, stainless steel will form and weld more cheaply.

Suitable surface finishes

Common finishes for Ti Grade 2 (CP): Type II anodizing, bead blasting, electropolishing. Use the finish selector →

FAQ

How is CP Grade 2 different from Ti-6Al-4V?
Grade 2 is unalloyed (commercially pure) titanium: much lower strength (485 vs 1000 MPa tensile) but far more ductile and formable at 20% elongation. Both share top corrosion resistance, but Grade 2 welds, bends, and machines more easily, while Grade 5 wins on strength-to-weight for loaded parts.
Can Ti Grade 2 be heat-treated for strength?
No. As a single-phase alpha titanium it isn't strengthened by heat treatment; you can only stress-relieve or anneal it. Its strength comes from cold work. If you need a heat-treatable, high-strength titanium, choose the alpha-beta alloy Ti-6Al-4V instead.
Is Grade 2 titanium easy to weld?
Relatively, yes, it's among the more weldable titaniums and joins cleanly by TIG. The catch is shielding: hot titanium readily absorbs oxygen, nitrogen, and hydrogen and embrittles, so the weld and heat-affected zone must be fully protected by inert gas (trailing shields or purge) until cooled.

Property values are typical/nominal for early guidance and vary by temper, grade, supplier and heat treatment. Confirm critical specs against a certified datasheet or with an mfgiq engineer.