The AlTiC master alloy has been prepared in different components to refine 99.8%Al and 99.98%Al, then compared to two typical A15Ti1B in refining efficiency and the grain nuclear. The result showed that the refining efficiency seemed better if the nucleation of high pure aluminum revealed complexity and variety. It may due to that the latency heterogeneous nucleation was efficient on the whole, consequently accelerated refining efficiency.