The work aims to enhance the surface hardness, wear resistance and corrosion resistance of TC4 alloy and broaden its application in the industrial field. The surface of TC4 alloy with preset pure Cu powder was treated by high current pulsed electron beam (HCPEB) apparatus. X-ray diffraction (XRD), optical microscopy (OM), Laser confocal microscope (LSM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize the phase composition and microstructure of the alloyed-layer on the surface. After irradiated alloying of Cu by HCPEB, an alloyed-layer of several microns was formed on the surface of the sample. The main phases were α‘, β, CuTi2 and Al2Cu. The microstructure was composed of equiaxed β phase and lath martensite α‘ phase. The alloyed surface after HCPEB irradiation generated abundant deformed structure for dislocation and twins, et al. Furthermore, the microhardness test results showed that the surface hardness increased after Cu alloying by HCPEB irradiation, and reached the maximum after 30-pulsed irradiation, which was about 17% higher than that of initial sample. Meanwhile, the results of electrochemical experiment showed that the surface corrosion performance of the sample was improved after alloying treatment. Compared to initial sample, the corrosion potential was increased by 302 mV and the corrosion current density was decreased by 3.397 mA/cm2 after 30-pulsesd irradiation. The friction and wear test results showed that the surface friction coefficient and wear rate of the sample were reduced after alloying treatment, and the friction coefficient and the wear rate were the lowest after 30-pulsed irradiation, respectively 0.36 and 2.959×10-3 mm3/(N?m), and the wear resistance was improved. The surface hardness, wear resistance and corrosion resistance of the samples after Cu alloying irradiated with HCPEB are improved, and the surface properties of the samples reach the best after 30-pulsed irradiation.