of revolution 2 onto which it is wound and to the lap of the layer below using a method of contact welding between two electrodes and by passing a medium frequency current the filaments 32 are thus welded together as winding progresses which means that when the insert 3 is removed from the winding device 20 it forms a component as one with the component of revolution 2 the insert 3 is then inserted in a container 4 as depicted in fig4 the container 4 for this purpose comprises a groove 41 of a shape that complements the insert 3 and into which the insert 3 is housed the container 4 forms the preform of the metal alloy matrix preferably made of titanium ti a lid 5 is attached to the container 4 by electron welding is evacuated then compacted using a hot isostatic compaction process the whole is then machined to obtain the finished mechanical component 10 a rod 10 depicted in fig5 the rod 10 identical in shape to the rod 1 in fig1 further comprises a composite insert 3 having a geometry of revolution the filaments 32 of which are partly directed in a rectilinear direction this rectilinear direction is perpendicular to the axes z 1 and z 2 this rod 10 is advantageously able to transmit one way tensile and or compressive forces the rectilinear portions 34 of the inserts 3 comprise filaments that are all directed in one and the same rectilinear direction the invention applies to any type of mechanical component the function of which is to transmit a tensile and or compressive force mainly in one direction and is therefore not restricted solely to rods which are just one application example according to an alternative form of the invention the.