Industrial pure titanium is divided into three grades based on its impurity content: TA1, TA2, and TA3. The interstitial impurity elements of these three industrial pure titanium gradually increase, so their mechanical strength and hardness also increase step by step, but their plasticity and toughness decrease accordingly.

The commonly used industrial pure titanium in industry is TA2, due to its moderate corrosion resistance and comprehensive mechanical properties. TA3 can be used when there are high requirements for wear resistance and strength. TA1 can be used when requiring good molding performance.

The TA1, TA2, and TA3 in the national standard correspond to Gr1, Gr2, and Gr3 in UNS.

TA1 and TA2 in iron content ω 0.095%, oxygen content ω 0.08%, hydrogen content ω 0.0009%, nitrogen content ω At 0.0062%, it has good low-temperature toughness and high low-temperature strength, and can be used as a low-temperature structural material below -253 ℃.