Industrial test on smelting titania slag by use of Panzhihua and Yunan titaniferrous ores in open ore-smelting furnace was studied. The smeltings characteristics and parameters were analyzed . It is practicable to smelt sulfate titania slag in open furnace that traditionally used for producing chloride slag by self-baking electrode, and preferable quality titania slag and good economic target can be obtained. Titania slag quenching and cooling is very good, for it greatly lowers the transformation degree from titanium suboxide to rutile.