The effects of Ti alloying method and Ti content on the low cycle fatigue behaviors of A356 alloy were investigated.The results show that cycle-hardening behavior of A356 alloy was susceptive to both the Ti alloying method and Ti content

in which the alloy with （0.14%） Ti always has higher cyclic hardening rate than that of the alloys with 0.1% Ti.Both A356 alloy alloyed by electrolysis （EA356 alloys） and by melting Al-10Ti master alloys （MA356 alloys） exhibit the similar cyclic hardening behavior when tested at low strain amplitude

while tested at high strain amplitude

the EA356 alloys show the quasi-stable state that cyclic hardening ability approaches to saturation

and for the MA356 alloys

the cyclic hardening continuously proceeds.The low-cycle fatigue life of the alloy is only sensitive to the Ti content.Whether alloyed by electrolytic low-Ti alloys or Al-Ti master alloy

the alloy with 0.1% Ti always has higher low-cycle fatigue life than that of the alloy with 0.14% Ti.The EA356 alloys have the similar low-cycle fatigue life as the MA 356 alloys if two kinds of alloys have the same Ti content.