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To obtain Ti 1-x Cr x O z , mixed powder of TiO 2 and Cr powders was sintered in a graphite die by spark plasma sintering (SPS). The composition and the microstructure of the sintered compacts were examined by XRD and SEM. In addition, the thermoelectric properties of the sintered compacts were measured, the relationship of the thermoelectric properties and phases was also discussed. The results showed that the multiphase with compositions of Ti n O 2n-1 , TiCrO 3 and Cr was obtained. The phases formed in a transformation from the rutile type TiO 2 to TiCrO 3 with the reduction during SPS and an increase in Cr additive fraction. The electrical resistivity of the sintered compacts greatly decreased due to an increase in Cr additive fraction. The thermoelectric performance of the sintered compacts was enhanced obviously, and the largest power factor of Ti 1-x Cr x O z with x＝0.25 reached 0.57 mW/K 2 m at 973 K.