Plastic deformation of crystalline materials

A method of plastic deformation of metals, alloys and other crystalline materials for controlling their structure and texture, comprising the steps of extruding a workpiece through two intersecting passages having equal cross-sections corresponding to a cross-section of a workpiece, determining three main directions corresponding to a flow direction, a perpendicular direction to a flow plane, and a perpendicular to the first mentioned and second mentioned direction, extruding the workpiece through two intersecting passages, changing the directions during placement of a workpiece in its initial position for each passage relative to a corresponding position in a predetermined passage by turning the workpiece by a predetermined angle around axes of the main directions, and cyclically repeating the steps of determining, extruding and changing for a number of passes.