In situ eutectic Al_(11)La_3 / Al composite material with regular orientation wasprepared by zone melt liquid metal cooling equipment of directional solidification under con-dition of high temperature gradient 700 K / cm and growth rate 6.0-20.0μm/s. Superposediffraction pattern of Al_(11)La_3/Al composite shows that preferred growth direction is(100)Al / (331) Al_(11)La_3, and habit plane is (002)Al/(116)Al_(11)La_3. A low density (103) twinis observed in Al_(11)La_3 and the growth of (103) twin induces to...