The process-dependent magnetization of a melt-textured YBCO sample has been investigated by performing certain measuring processes. By analyzing the difference of magnetization, the relation of Mirr(H1→H2,T)+Mirr(H2→H1,T) ≈ 0 is concluded at least in the range of 10 ≤ H1, H2 ≤ 30 kOe and 5 ≤ T ≤ 85 K.