A novel method for fabricating Magnéli phase (MP) Ti_nO_2n-1 (4<n<10), carbothermal reduction sieving, in air atmosphere was introduced. The influence of the reduction temperature and reduction time on the phase structure and resistivity of reduction product was investigated. The results show that increasing the reduction temperature and prolonging the reduction time are beneficial for the reduction of TiO₂ to MP Ti_nO_2n-1. MP Ti_nO_2n-1 (n=4, 5) powder was obtained after reduction at 1350 °C for 20 min, and its particle size is 0.5~8 μm according to results of scanning electron microscopy analysis. Resistivity of the reduction product is decreased significantly with prolonging the reduction time at 1350 °C. The minimum resistivity of 79.3 Ω?cm is achieved for the product after reduction at 1350 °C for 50 min, and the phase composition is mainly Ti₃O₅.