annealed
  退火的
  An·neal v. t. [imp. & p. p. Annealed p. pr. & vb. n. Annealing.]
  1. 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.
  2. To heat, as glass, tiles, or earthenware, in order to fix the colors laid on them.
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  annealed
       adj : made less brittle by heating and then cooling; "used
             annealed paving blocks"