verb (used with object)
to toughen or strengthen (a metal) by cold-working or another mechanical process.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(tr) to increase the strength or hardness of (a metal) by a mechanical process, such as tension, compression, or torsion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012