Definition and classification of titanium alloys

Titanium alloy refers to an alloy matrix, with one or more alloying elements added, through smelting or powder metallurgy methods. According to the types and contents of alloying elements, titanium alloys can be divided into the following categories:

1 α titanium alloy: mainly containing stable α phase elements such as aluminum, carbon, oxygen, nitrogen, etc., it has good creep resistance and low-temperature toughness, but low strength, suitable for temperature ranges of 150~350 ℃.

2 β titanium alloy: mainly containing stable β phase elements such as molybdenum, niobium, vanadium, chromium, etc., it has high strength and high plasticity, and can obtain different structures and properties by adjusting the heat treatment process. It is suitable for the temperature range of 350-550 ℃.

3 Α+β titanium alloy: It contains elements that stabilize both α and β phases, and is the most commonly used type of titanium alloy. It has high strength and toughness, and its performance can be adjusted by controlling the proportion and distribution of α and β phases. It is suitable for temperature ranges of -250~500 ℃.

4. Near β titanium alloy: containing a small amount of stable α phase elements, mainly composed of β phase, with high strength and high ductility. It can achieve high strength and toughness through aging treatment and is suitable for temperature ranges of 150~600 ℃.

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