ACNs/Ti composites were prepared by discharge plasma sintering (SPS). The microstructures, phase compositions and mechanical properties of the composites at different sintering temperatures were also characterised using scanning electron microscopy, optical metallurgical microscopy and an electronic universal testing machine. The results show that at lower temperatures (800 °C), although the unreacted ACNs contribute to the strength of the composites, their weak interfacial bonding with the matrix leads to a severe reduction in the plasticity of the composites. At higher temperatures (1000 °C), the TiC particles fully reacted with the matrix are larger in size after overgrowth. This phenomenon causes a decrease in the strength of the material according to the Holpecki formula. At a sintering temperature of 900 °C, the ACNs fully react with the Ti matrix to produce TiC particles. This fine dispersed TiC is more pronounced. the TiC particles are distributed along the perimeter of the matrix, forming a quasi-continuous mesh distribution. It has the best strong plasticity matching, and the tensile strength, yield strength, and elongation are 648.19 MPa,551.02 MPa, and 36.19%, respectively.