摘要：As a β stabilizing element in ti-based alloys,the effect of mo on phase constitution,microstructure,mechanical and shape memory properties was *** compositions of ti-xmo-3sn alloys(where x=2,4,6,at.%) were prepared by arc melting.A binary composition of ti-6 mo alloy was also prepared for ***-xmo-3sn alloys show low hardness and high ductility with 90% reduction in thickness while ti-6 mo alloy shows high hardness,brittle behavior,and poor *** emission scanning electron microscopy(FESEM) reveals round morphology of athermal ω(ωath) *** presence of ωath phase is also confirmed by X-ray diffraction(XRD)in both as-cast and solution-treated and quenched *** optical microscopy(OM) and FESEM show that the amount of martensite forming during quenching decreases with an increase in mo content,which is also due to β→ω *** hardness trends reinforce the presence of ωath *** shape memory effect(SME) of 9% is the highest for ti-6 mo-3sn *** SME is trivial due to ωath phase formation;however,the increase in SME is observed with an increase in mo content,which is due to the reverse transformation from ωath and the stress-induced martensitic *** addition,a new and very simple method was designed and used for shape memory effect measurement.