Heating Then Cooling Metal to Make It Stronger
This page is the CodyCross answer for the clue below from Deserts of the world, Group 1606, Puzzle 2 (Protected Land).
Question is: Heating Then Cooling Metal to Make It Stronger
and the answer is: ANNEALING
Word Meaning:
ANNEALING — The heating of solid metal or glass to high temperatures and cooling it slowly so that its particles arrange into a defined lattice to remove residual stress.
Definitions from Wiktionary.