Aluminium matrix composites reinforced by silicon carbide and aluminium borate whiskers were hot rolled at 550 degreesC, and the hot rolling behaviors of the composites were studied by scanning electronic microscope and X-ray diffraction (anti-pole figure). The results indicated that the whiskers in composite were reorientated, and some whiskers were broken during hot rolling process. The cracks in hot rolled composites may be related to the interface slide which is dependent on the interface strength of the composites. The tensile properties of hot rolled composites were also investigated.