Aluminum based metal matrix composites reinforced by continuous carbon fibre textiles (3D CF/Al-MMC) offer a high lightweight potential for usage under high thermo-mechanical loads. Fields of application and utilization of metal matrix composites (MMC) are aerospace, automotive and other demanding types of industries, which require high mechanical properties, particularly stable at elevated temperatures. Main problem encountered in lightweight engineering for elevated temperatures is the change of the microstructure, and consequently drastic decrease of the stiffness and strength. There are reasonable presumptions, that this effect can be avoided by utilization of MMC with an appropriate reinforcement structure. This paper contributes to understanding the effect of elevated temperature on the mechanical properties of 3D CF/Al-MMC. The tested materials have been manufactured using the high pressure die casting (HPDC) method. The three point bending test has been performed to obtain results at four different temperatures. The bending strength and stiffness have been taken into consideration. Fracture analysis by the help of SEM microscopy has been carried out to exhibit the quality of adhesion between matrix and reinforcement. Accompanying quality analysis of composites by computer tomography (CT) has been performed.