Hardening is the process by which something becomes harder or is made harder.
Hardening may refer to:
Hardening (metallurgy), a process used to increase the hardness of a metal Hardening (botany) or cold hardening, a process in which a plant undergoes physiological changes to mitigate damage from cold temperatures Target hardening, strengthening of the security of a building or installation to protect it from attack Hardening (computing), the process of securing a system against attack Sclerotization, a biochemical process forming cuticle in arthropods
See also
Harden (disambiguation) Hardness, a measure of resistance to deformation