Functionally gradient and micro-channeled Al2O3-(t-ZrO2)/HAp composites were fabricated using the multi-pass extrusion process depending on the sintering temperature. The continuous pores were homogeneously formed in the second-passed samples and their size was about 180 mu m in diameter. The functionally gradient Al2O3-(t-ZrO2)/HAp composites consisted of three layers, i.e., HAp/HAp-Al2O3-ZrO2/Al2O3-ZrO2. The relative density and bending strength increased as the sintering temperature increased and in the sample sintered at 1400 degrees C, their maximum values were about 62.2% and 107.8 MPa, respectively.