The growth of interfacial compounds between TiO 2 and Bi 2 O 3 during transient liquid phase bonding at 900, 1000 and 1100°C for various times was investigated. The microstructures and compositions of compounds in joints were analyzed by means of SEM and EPMA. It was found that the compound Bi 4 Ti 3 O 12 forms initially and replaces the Bi 2 O 3 interlayer. Bi 2 Ti 4 O 11 then arises at the interface between Bi 4 Ti 3 O 12 and TiO 2 and the metastable Bi 2 Ti 2 O 7 phase appears last at the interface between Bi 4 Ti 3 O 12 and Bi 2 Ti 4 O 11 . The modes and activation energies of the growth of Bi 4 Ti 3 O 12 and Bi 2 Ti 4 O 11 were determined respectively. Holes in the middle of the joint heated at 1100°C for 24h were also found.