Elemental cobalt and titanium powder mixtures have been mechanically alloyed (MA) to form two independent Co-Ti intermetallic compositions. In both cases nanometre-sized-crystalline particles have been embedded into an amorphous matrix. Resulting powders have been found to consist of Co_66.4Fe_0.6Ti₃₃and Co_48.6Fe_1.0Ti_50.4. At these concentrations and independent of the Fe content, formation of hexagonal Co₂Ti intermetallic has been observed when heating the powders up to 873 and 1173K, respectively. Crystallization of powders also has resulted in the formation of Co₃Ti and CoTi compounds, which respectively co-exist with the Co, Ti phase.