anneal

When you anneal metal or glass, you heat it and then cool it in order to make it less brittle and more malleable.

Metallurgists — engineers who specialize in the properties and uses of metals — have to know a variety of methods used to anneal different kinds of metals. You can also anneal glass, to make it stronger and to help keep it from shattering.

Definitions of anneal
  1. verb
    bring to a desired consistency, texture, or hardness by a process of gradually heating and cooling
    synonyms: normalize, temper
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    type of:
    harden, indurate
    make hard or harder
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