double aging

double aging

[¦dəb·əl ′āj·iŋ]
(metallurgy)
Introduction of a primary (stabilizing) and a secondary aging treatment to control the precipitate formed from a supersaturated alloy and to achieve specific properties in the material.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.