Abstract: W/ Cu functionally graded material was prepared by infilt ration. The W skeleton with graded porositywas fabricated using water cooking pore-agent , and then molten copper was infilt rated into the W skeleton. The dist ributions of the element s in the longitudinal section was tested. The result s show that the dist ributions of concent ration of copper and tungsten were gradient in the longitudinal section. The circumstance of service was simulatedby water quenching and the thermal st ress was analyzed. The result s show that the maximum thermal st ress is always in the tungsten-rich region.