Abstract: The TiB₂/Cu composites with TiB₂ mass fraction of 1wt%-5wt% were prepared by spark plasma sintering (SPS), and the electrical conductivity and hardness were tested. The electrical conductivity of TiB₂/Cu composites decreases from 96.9% (International Annealed Copper Standard, IACS) to 65.1%(IACS) with TiB₂ mass fraction increasing from 0 to 5wt%, while the Brinell hardness increases from 42.8 to 65.2. To discuss the effect of TiB₂ content and current on TiB₂/Cu composites arc erosion, the electrical contact tests were performed at 24 V and different direct current for TiB₂/Cu composites with the different TiB₂ mass fractions. For TiB₂/Cu composites with different TiB₂ mass fraction, the average arc duration, average arc energy and mass loss increase with the increase of current. The cathode of TiB₂/Cu composites mass loss more than that of the anode. In general, the TiB₂/Cu composites are transferred from cathode to anode. At 24 V and 25 A, the arc duration and arc energy of TiB₂/Cu composites with different TiB₂ mass fractions are fluctuant with the increase of operation times. On the whole, it shows a tendency to increase gradually. The 3wt% TiB₂/Cu composite has higher stability, the average arc duration and average arc energy are lower than the others. With the increase of mass fraction of TiB₂, TiB₂/Cu composites present less mass loss and shallower arc erosion pits.