A series of Ti-H beta zeolites were synthesized by liquid-solid isomorphous substitution. H beta and Ti-H beta zeolites were characterized by BET, XPS, IR, etc., and studied in the vapor phase Beckmann rearrangement of cyclohexanone oxime. In comparison with pure H beta, the incorporation of Ti in the H beta framework leads to larger BET surface area and weaker Bronsted acid sites. The incorporation of Ti in the H beta framework increases the conversion of cyclohexanone oxime and its stability. It is inferred that for the catalysts having the structure of a beta zeolite, the suitable acid sites for the vapor phase Beckman rearrangement might be the weak Bronsted acid sites.