Electro-slag remelting (ESR) is one of the processes to manufacture quality ferrotitanium. High-grade ferrotitanium is produced by electro-slag remelting in electric furnaces with a copper water-cooled crucible. ESR furnaces use direct alternation current with controlled frequency. Such furnaces are characterized by low inductance, high efficiency factor and uniform heat flow. Charge materials are composed of chips of unalloyed steels and titanium alloys.