Equiatomic CuZrAl and CuZrAlTi medium entropy alloys were designed and synthesized by mechanical al-loying and spark plasma sintering technique.The alloying behavior, phase evolutions, microstructures and properties of samples were investigated by X-ray diffraction, differential scanning calorimetry, field emis-sion scanning electron microscopy, microscopy/Vickers hardness testing and electrochemical polarization measurement.The results indicate that the final products of as-milled alloys consist of amorphous phases. Ti addition improves the glass forming ability of as-milled alloys.The as-sintered CuZrAl alloy contains face-centered cubic (fcc) solid solution, Al1.05 Cu0.95 Zr and AlZr2 phases at different sintering tempera-tures.With Ti addition, the as-sintered sample is only composed of intermetallics at 690°C, while fcc1, fcc2 and CuTi3 phases are formed at 1100°C.CuZrAlTi-1100°C alloy exhibits the highest hardness value of 1173 HV0.2 owing to the high sintering density, solid solution strengthening and homogeneous precipi-tation of nano-size crystalline phase.CuZrAlTi-690°C alloy presents a similar corrosion resistance with 304L stainless steel in seawater solution and further possesses the lower corrosion rate.