The good mechanical properties of TA2 titanium plate at room temperature are inseparable from its closely connected microstructure. It is observed that when the magnification is 400 times, the main grain size length is in the range of 25~50um, the large grain length can reach 50um, the small grain size is 15um, and the grain size of most grains is about 25um. These data show that the grain size distribution of the annealed TA2 titanium plate is relatively uniform, and the shape is relatively regular, mostly polygonal. With the increase of strain rate, the tensile strength of TA2 titanium plate shows an increasing trend.

The tensile strength of TA2 titanium plate is more significantly affected by temperature. When the temperature rises from 300 ° C to 1000 ° C, the tensile strength value decreases from 183.34 MPa to 3.38 MPa, and a significant decrease occurs at 500~600 ° C. Therefore, the increase of temperature in the high temperature stage has a significant impact on the tensile strength of TA2 titanium plate, and 500~600 ° C is the critical temperature for the mechanical properties of TA2 titanium plate to seriously decay, which needs to be paid enough attention in the chemical industry.