Technology of metal processing always played an important role in evolution of human technology since ancient times. The development of technology kept up with metal processing. Appearance of hi-tech machinery allows to prepare sophisticated structures. Latest stage in metal parts fabrication is development of modern 3D printers able to fabricate unique metal pieces, which cannot be obtained in any other way of processing, metal casting or moulding. The main challenge of 3D printing is the cost of the piece and machinery.