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Crossword clue: hardening something by heat treatment

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

annealing 9 letters wn-def

hardening something by heat treatment

tempering 9 letters wn-def

hardening something by heat treatment

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Related clues

Another word for annealing moderating by making more temperate