A mixture of titanium dioxide and graphite vacuum pressed into a briquette and sintered was reduced in a plasma arc furnace at 2600° to 2900°C. Argon and argon-hydrogen mixtures (H
2 5 to 20%) were used as plasma arc generating gases. The optimum mixing ratio C/TiO
2 is about 2.10. The mixture 4g in weight is fused within 1 to 4min. Reduction proceeds rapidly to produce 80% Ti in this period and then does slowly. When argon is used as an arc gas, the maximum Ti content does not exceed 87%. When the argon-hydrogen mixture is used, deoxidation proceeds. The Ti content approaches to 94%, if Ar-20%H
2 gas is used. The decarburization effect is not so expected.
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