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Titanium alloys can be divided into three categories according to the phase composition: α alloys, (α+β) alloys and β alloys. China is represented by TA, TC,Titanium Bar and TB respectively. The α alloy contains a certain amount of elements that stabilize the α phase,Titanium Bar and it is mainly composed of the α phase in equilibrium. Alpha alloy has a small specific gravity, good thermal strength,Titanium Bar good weldability and excellent corrosion resistance. The disadvantage is that it has low room temperature strength and is usually used as a heat-resistant and corrosion-resistant material. Alpha alloys can generally be divided into full alpha alloys (TA7),Titanium Bar near alpha alloys (Ti-8Al-1Mo-1V) and alpha alloys with a small amount of compounds (Ti-2.5Cu). ② The (α+β) alloy contains a certain amount of stable α-phase and β-phase elements,Titanium Bar and the structure of the alloy is α-phase and β-phase in the equilibrium state. (α+β) alloy has medium strength and can be strengthened by heat treatment, but its welding performance is poor. (α+β) alloys are widely used,Titanium Bar and the output of Ti-6Al-4V alloy accounts for more than half of all titanium materials.

The β alloy contains a large number of elements that stabilize the β phase,Titanium Bar which can keep all the high temperature β phases to room temperature. β alloys can generally be divided into heat-treatable β alloys (meta-stable β alloys and near-meta-stable β alloys) and thermally stable β alloys. Heat-treatable β alloy has excellent plasticity in the quenched state,Titanium Bar and can achieve tensile strength of 130~140kgf/mm2 through aging treatment. Beta alloys are usually used as high-strength and high-toughness materials. The disadvantages are high specific gravity, high cost,Titanium Bar poor welding performance, and difficult cutting processing.