此图所示为 Ti80 合金在真应变 0.9 时所对 应的加工图，图中阴影部分为流变失稳区，等值线上的数字表示功率耗散系数（η）。η 值越大，组织演变 耗散的能量占比越大，组织形态变化也越大。

This figure shows the corresponding processing diagram of Ti80 alloy when the true strain is 0.9. The shaded part in the figure is the rheological instability area, and the number on the contour line represents the power dissipation coefficient (η). The greater the value of η, the greater the proportion of energy dissipated by the evolution of the organization, and the greater the change in the organization's morphology.