The effect of pitch (Z) ratio on the fluidity of coal and of carbonization temperature on the wetting behaviour of coal surface in the binary mixtures have been investigated with the experimental runs performed by the constant-torque Gieseler plastometer. The binary mixtures consisted of Tunçbilek brown coal (TK) or its semicokes and Z in different ratios. TK200, TK400, TK600, TK800 and TK1000 semicokes were obtained at 200°, 400 °, 600 °, 800 ° and 1000 °C carbonization temperatures respectively. It was found that the maximum fluidity values of the binary mixtures increases with increasing Z ratios. The lowest maximum fluidity values were obtained in TK400+Z binary mixture and it was shown that TK400 is the semicoke which has the optimum surface wetting behaviour. It was determined that the maximum fluidity values increase in the order of TK400, TK200, TK, TK600, TK800 and TK1000. The surface wettability also decreases in the same order.