Production methods of metal wire reinforced composite yarn were investigated and tungsten wire reinforced composite yarn was produced in the twisting machine. In the literature, commonly copper, cromium/nickel, steel were used as core but tungsten wire was used in core of yarn differently in this study and nylon 6.6 yarns were used as sheath. Two 1400 dtex and one 2100 dtex % 100 nylon 6.6 yarns were plied in the 'S' direction and produced plied yarn is wrapped around the tungsten wire in the 'Z' direction so especially voluminous sheath yarns were prefered to cover around the tungsten wire completely. Performance of produced tungsten wire reinforced composite yarn was tested by measuring yarn count, twist, and tensile properties. Also surface temperature of composite yarn was measured, depending on electrical current and compared with surface temperature of bare tungsten wire.