The effect of carbon ordering on the crystal structure and resistivity of cubic TiCy was studied. The ordering of TiCy below 1020 K was found to yield cubic or trigonal Ti2C or orthorhombic Ti3C2, depending on composition. Temperature-dependent resistivity data for compositions from TiC0.522 to TiC0.62 indicate that the temperature of the reversible equilibrium order-disorder transition ranges from 980 to 1000 K.