1. Forging temperature is too high or too low: the forging temperature range of titanium alloy forgings is narrow. If the forging temperature is too high or too low, the plasticity of titanium alloy materials will become worse, and it is easy to appear the phenomenon of ultra-negative difference.
2. Forging speed is too fast or too slow: Forging speed is one of the important factors affecting the quality of titanium alloy forgings. If the forging speed is too fast or too slow, the strain rate of the material will be too high or too low, which will lead to the phenomenon of ultra-negative difference.