Retech Systems LLC | A SECO/WARWICK Company retech, systems, llc, custom, furnace, system, engineering, design, manufacturing, melting, plasma, electron, beam, vacuum, induction, arc, remelt, metallurgical, alloy, powder, atomization Retech is the most fully integrated, custom furnace manufacturer in the world providing processes and technologies are used in melting, refining and casting reactive and refractory metals, such as Titanium & Titanium alloys, super alloys and rare earth metals.