Crossword puzzle clue "toughen as steel"

Here are the possible solutions for toughen as steel clue

Answer
Clue
Relevancy
anneal
Clue
Toughen, as steel
Toughen, as glass or steel
Toughen
Toughen, as glass
Treat with heat to toughen
Toughen or temper
Definition
to make (as steel or glass) less brittle by heating and then cooling
titanium
Clue
Element used to toughen steel
aman
Clue
Make -- out of (toughen up)

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