recalescence

From Latin recalescere (“to grow warm again”), from re- +‎ calescere (“to grow warm”), inchoative of calēre (“to be warm”). In use since at least 1873 (Webster's Ninth New Collegiate Dictionary, published 1985).

recalescence (countable and uncountable, plural recalescences)

1. An increase in temperature that occurs while cooling metal through a range of temperatures in which change in structure occurs.

• reglow