Nanopowders of Bi2Ti2O7 were synthesized by a metallorganic decomposition (MOD) technique. Pure Bi2Ti2O7 nanocrystals formed after annealing at 550degreesC for 5 min. X-ray patterns show that Bi20TiO32 is a metastable phase during Bi2Ti2O7 formation. It was found that there were two peaks in the curves of the dielectric response as a function of temperature for pressed nanocrystalline Bi2Ti2O7 samples. The Curie temperature decreases with decrease of grain size whereas the ferroelectric-ferroelectric phase transition temperature increases. The hysteresis loops observed also suggest that Bi2Ti2O7 might belong to a ferroelectric material.