- To subject to great heat, and then cool slowly, as
glass, cast iron, steel, or other metal, for the purpose of rendering
it less brittle; to temper; to toughen. - To heat, as glass, tiles, or earthenware, in order to
fix the colors laid on them.
Meaning of 'anneal' (Princeton's WordNet)
1 . anneal
[ v]
Meaning (1): - bring to a desired consistency, texture, or hardness by a process of gradually heating and cooling