Rather than adding other metals, they developed a complex mechanical process involving repeated heating and very severe mechanical deformation, known as temp-forming.
2019年6月六级真题（第三套）阅读 Section A
柯林斯高阶英汉双解学习词典释义
V-ERG
（使）变形;（使）成畸形;损毁…的外形
If something deforms a person's body or something else, it causes it to have an unnatural shape. In technical English, you can also say that the second thing deforms.