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TiO2-B nanofibres with large surface area,high thermal stability and high crystallinity were synthesized by steam thermal method from K2Ti2O5.Compared to the bulk TiO2-B(TB-Bulk)prepared from K2Ti4O9,nanofibrous TiO2-B was successfully obtained by steam thermal method using K2Ti2O5 as the precursor,which,to our knowledge,has never been reported before.