TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Materials: The mold may be fabricated from a composite matrix, boron nitride, inorganic compound, or graphite. The feedstock may be carbon nanotube compound, composite matrix, or super abrasive compound.    TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Components: The movement mechanism is controllable to rotate the feed point about the mold. It is controllable to move the feed point within a three-dimension coordinate space. The mold structure is separable from the workpiece by disintegration of the mold structure or by dissolving the mold. The energy beam may be an electron beam, ion beam, plasma beam, flame spray, gas tungsten beam, metal arc, gas metal arc, microwave beam, radio frequency beam, tungsten-inert gas beam, metal-inert gas beam, or laser beam. The controller is operable to control the energy beam producing mechanism to focus the energy beam on the feed point or to scan the energy beam about the feed point. A power supply is coupled to the energy beam producing mechanism. It is electrically coupled to the feedstock at the feed point. A housing (34) encloses the mold support, feed mechanism, energy beam producing mechanism, and movement mechanism. The housing is evacuated during fabrication of the workpiece. The feedstock is a wire. The controller is operable to control the feed mechanism to pay out the wire feedstock in coordination with the movement mechanism. The feedstock may be a powdered feedstock. The mold is a crucible having a die. The movement mechanism moves the crucible with respect to a base plate (40) to extrude molten feedstock through the die. The mold further includes mold components adjustable in position, size or volume while the feedstock is sequentially fused for forming the workpiece.    TECHNOLOGY FOCUS - METALLURGY - Preferred Materials: The mold may be fabricated from a metal having a melting point higher than the melting point of the feedstock. The feedstock may be aluminum, aluminum alloy, titanium, titanium alloy, or tool steel.