The intrinsic magnetic properties of (Sm(0.5)RE(0.5))Fe11Ti (RE = Ce, Pr, Nd, Sm, Gd, Tb) compounds were studied by thermomagnetic analysis, vibrating sample magnetometry and computer calculations. (Sm(0.5)RE(0.5))Fe11Ti (RE = Ce, Pr, Nd, Sm, Gd, Tb) compounds had tetragonal ThMn12-type structure and uniaxial magnetocrystalline anisotropy with easy magnetization c-axis. The anisotropy constant K-1 was in the range of 1.75 to 9.2 MJ/m(3) and approximately one order higher than K-2. Among the compounds investigated, SmFe11Ti had the highest anisotropy of K-1 = 9.2 MJ/m(3), K-2 = 0.4 MJ/m(3) and mu(0)H(A) = 19.8 T. Substitution of any other rare-earth element for Sm decreased the magnetocrystalline anisotropy.