Nanocomposites can be defined as materials that incorporate nanosized particles into a matrix of standard material. A drastic improvement in the mechanical, thermal, electrical properties can be achieved by the inclusion of the nanoparticles. The advent of high performance nanofillers such as carbon nanotubes, graphene nanoplatelets, metal fibers, etc. provides novel possibilities for many applications of nanocomposites in highly demanding application area. One very interesting and potential class of nanocomposites is the hybrid composites where fundamentally different types of fillers are mixed to produce functionally versatile composite materials. However, the process physics and production methods of hybrid composites are complex. The widespread application of the hybrid composites materials requires a clear understanding of the connections among the manufacturing parameters, the properties of the corresponding fillers, and the interactions of the fillers and matrix materials. This work attempts to overcome some of the existing shortcomings (e.g. low thermal/electrical conductivity) of the nanocomposites by developing new hybrid composites. The preparation of composites containing conductive micro/nano hybrid fillers such as mixtures of copper fibers, graphene and CNTs were done with the use of a twin-screw extruder. The mechanical, electrical, thermal, and morphological properties of the produced composites were studied. The influences of the factors like filler contents, filler characteristics, thermal annealing, etc. on the properties such as stiffness, damping, vibration, electrical and thermal characteristics, etc. of the composites were systematically analyzed. Results show that hybridization of the fillers in the composites leads to significant improvements in some of the mentioned properties. The conducted research provides new insights for the economic and efficient production of the tailored nanocomposites based on hybrid material concept.