Dense, highly < 110 >-textured BaTiO3 ceramics were prepared by the reactive-templated grain growth method. Needlelike TiO2 (rutile) particles with their needle axis parallel to < 001 > were used as reactive template particles. Slurry containing an equimolar mixture of TiO2 and BaCO3 was tape cast to form a green compact, in which TiO2 particles were aligned with their needle axis parallel to the casting direction. Calcination of the green compact changed TiO2 particles into BaTiO3 grains with their < 110 > direction parallel to the casting direction, for which the topotaxial relation of < 001 >(TiO2) parallel to < 110 > (BaTiO3) was responsible. Sintering yielded a dense, highly textured BaTiO3 compact.