second-stage annealing

例句：

1. 1. The process of second-stage annealing is crucial for the quality improvement of the material.
   第二阶段退火过程对于材料质量的提升至关重要。
2. 2.During the manufacturing process, second-stage annealing is used to reduce internal stresses in the metal.
   在制造过程中，第二阶段退火用于减少金属内部的应力。
3. 3. The researchers conducted a study on the effect of second-stage annealing onthe mechanical properties of steel.
   研究人员对第二阶段退火对钢铁机械性能的影响进行了研究。