Past tense of austenite: heated a metal (usually steel) to a high temperature and then cooled it in a specific way to change its internal structure and make it stronger or more flexible.
From austenite, a form of steel named after William Chandler Roberts-Austen, a 19th-century English metallurgist who studied iron and steel. The suffix -ize means to treat or process, and -d marks the past tense.
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