Elualloy ọkpọkọnrụrụ ike bụ iji ụzọ nkwado ígwè.A makwaara dị ka hardening ma ọ bụ ike siri ike.Ike nke ihe na nnukwu (ma ọ bụ dum) ikike iguzogide nrụrụ (ma ọ bụ nrụgide na-asọba).Isi ike bụ ikike nke ihe ahụ iguzogide nrụrụ rọba mpaghara (ma ọ bụ ike, Vickers hardness, Rockwell hardness ma ọ bụ Brinell).Ha abụọ nwere mmekọrịta kwekọrọ na ya n'ọtụtụ ọnọdụ.Ike nke ihe onwunwe, nke ukwuu na-eguzogide nrụrụ plastik, ọnụ ahịa siri ike dị elu.N'aka nke ọzọ, nke dị elu nke ike nke ihe onwunwe, ihe nwere ike ịbụ n'ihi ụba brittleness, ike ya adịghị egosipụta n'ụzọ zuru ezu na ike dị otú ahụ index uru adịghị elu.

N'ihi na ogologo doro okpomọkụ ọgwụgwọ, na ojiji nke ihe na okpomọkụ nke ọma n'okpuru recrystallization okpomọkụ nke alloy tube elu-nrụgide ígwè anwụrụ ihe onwunwe, na-ejikarị oyi (oyi deformation) pụtara ime ya site deformation ike ka mma ike.Ya mere, deformation na-ewusi ihe kacha mkpa recrystallization okpomọkụ nke ihe ndị na-esonụ oyi deformation, na n'ókè nke deformation (njehie) na-amụba, na-eme ka a elu njupụta nke dislocations (crystal ntụpọ), elu nke dislocation njupụta na crystal, ka ukwuu ogo nkwalite, nke na-abawanye nrụgide eruba.Mgbe nrụrụ eruba nrụgide nke ígwè tubes ekwesịghị ịha n'ihu eruba nrụgide deformation ike nrụrụ gbakwunyere mmụba eruba nrụgide.Iji deformation ike iji nweta elu ike ígwè ngwaahịa, bụ a ahụkarị elu-carbon ígwè oyi-adọta ígwè waya na ala-carbon ala alloy duplex ígwè oyi-adọta ígwè waya.

Site na ogo nke nrụrụ na-abawanye, ike nke ihe na ike siri ike dị elu ma dị elu, ma ductility ya na ike siri ike na-emekarị ka ọ dị ala ma dị ala, na-arịwanye elu na-agbaji, nke dị mkpa iji mee ihe siri ike iji meziwanye ọnọdụ ahụ.Internal induced na martensitic frasi mgbanwe n'oge jụrụ na-adọ maka hardening, ya kacha mkpa anụ ahụ, ọ bụkwa nke deformation ike, ma oge a ọ bụghị site na mpụga deformation, ma si martensitic mgbanwe usoro nke crystal elu-njupụta bit onwe ya shiee eme site ndudue. .