The Ti x Co 1 + x Fe 2 - 2 x O 4 (0.0=<x=<0.7) ferrite powders are fabricated by a sol-gel method. The growth of particles, crystallographic and magnetic properties of powders are investigated by X-ray diffraction, Mossbauer spectroscopy and vibrating sample magnetometer. Ti x Co 1 + x Fe 2 - 2 x O 4 (x=0.2) ferrite powder annealed at and above 873K have only a single spinel structure and behave ferrimagnetically. Powder annealed at 773K has a typical spinel structure and shows a paramagnetic and ferrimagnetic nature, simultaneously. The formation of nano-crystallized particles is confirmed when Ti x Co 1 + x Fe 2 - 2 x O 4 (x=0.2) powder is annealed at 673K. The magnetic behavior of powders annealed at and above 673K shows that an increase in the annealing temperature yields a decrease in the coercivity and, in contrast, an increase in the saturation magnetization. In the Ti x Co 1 + x Fe 2 - 2 x O 4 (x=0.2) ferrite powder the maximum coercivity and the saturation magnetization are 1564 Oe and 62.6 emu/g, respectively. All the structures of Ti x Co 1 + x Fe 2 - 2 x O 4 (0.0=<x=<0.7) ferrite powders are spinel, and the lattice constants increase with increasing x. The Mossbauer spectra at room temperature, consisted of two Zeeman sextets (0.0=<x=<0.4) due to Fe 3 + ions at tetrahedral and octahedral sites, changed gradually to a doublet (x=0.7). The variation of Mossbauer parameters with the crystallographic and magnetic properties of powders have been discussed. The magnetic hyperfine fields decrease with increasing x in Ti x Co 1 + x Fe 2 - 2 x O 4 (0.0=<x=<0.7). The coercivity decreases fast but the saturation magnetization decreases slowly with increasing x in Ti x Co 1 + x Fe 2 - 2 x O 4 .