Hardening

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
 * Hardening (computing), the process of securing a system against attack
 * Target hardening, strengthening of the security of a building or installation to protect it from attack
 * Sclerotization, a biochemical process forming cuticle in arthropods