Using a vacuum consumable arc melting furnace, the methods of adding oxygen and iron to pure titanium and the effects of these additives on the mechanical properties of titanium were studied. The chemical composition and mechanical properties of ASTM grads 1, 3 and 4 were used as targets in the experiments. Addition of oxygen in the form of Ti-10wt% O master alloy gave more consistent results than in the form of TiO₂. Iron was added in the form of powder. Under the pressure employed in the main experiment about 20% and 50% of oxygen and iron were found to be a loss in the process of melting, respectively. As a result oxygen and iron contents of the grades 3 and 4 turned out to be a little higher than expected, giving rise to the much higher ultimate tensile strength and yield strength but slightly higher reduction in area than the lower ASTM limits. The grade 1 to which nothing was added was satisfactory both in the chemical composition and mechanical properties.