Three dimensional printer

A three-dimensional printer, comprising:

• a light system including an array of light sources and an optical element for one or more of the light sources, wherein the array of light sources includes least two light sources, each light source emits light at one or more wavelengths in the range of 350 nanometers to 1100 nanometers, and the optical element directs light emitted from the one or more light sources towards a focal region on a microwire and a substrate, wherein the light sources provide sufficient energy to at least partially melt the substrate in the focal region;
• a print head including a print nozzle for feeding the microwire into the focal region, wherein the microwire exhibits a diameter in the range of 0.1 millimeters to 1 millimeter and the microwire includes at least one of a transition metal, aluminum, and magnesium;
• and
• a print bed for supporting the substrate, wherein at least one of the print head and the print bed are moveable relative to the other.