A new β-type alloy Ti30Nb5Ta6Zr for dental implant with low Young’s modulus, medium-high tensile strength, good plasticity and biocompatibility was designed according to β coefficient of stabilization kβ and d-electron theory. The change of microstructures and mechanical properties for the alloy after solution treatment followed by aging in β phase region was investigated. It is found that the alloy is composed of metastable β phase after solution treatment in β phase region; ω phase precipitates when aged at low temperature, while α phase precipitates gradually when the aging temperature increases. With the aging temperature increasing, the strength and Young’s modulus of the alloy increase first and then decrease, while the elongation of the alloy decreases first and then increases. The alloy after 800 oC, 30 min solution treatment and 500 oC, 12 h aging possesses excellent integrated mechanical properties and can meet the requirement for dental implant