This paper describes the effect of thermomechanical processing on microstrucural evolution of three alloys, namely Ti-13Nb-13Zr (T1), Ti-20Nb-13Zr (T2) and Ti-20Nb-20Zr (T3), with an objective to develop equiaxed microstructure in all three alloys by subjecting them to appropriate hot-rolling conditions. The alloys were hot-rolled in α + β phase field and then subjected to various heat treatments. Samples from the hot-rolled alloys were subjected to solution treatment (ST) in β and α + β phase fields, respectively, and subsequently aged at different temperatures for the same time interval. Phases evolved on various treatments were studied using X-ray diffraction (XRD), optical microscope and electron probe microscope techniques. The micrographs of the hot-rolled samples of T2 and T3 alloys reveal fine equiaxed structure; on the other hand, a mixture of equiaxed and elongated a phase is observed in alloy T1. X-ray diffraction analysis of the β ST and water-quenched samples clearly exhibits the formation of α′ in T1 alloy and, α′, α″and β phases in T2 and T3 alloys. However, α″phase is observed for T1 alloy only in α + β ST condition. X-ray diffraction analysis of T3 sample subjected to β ST and aging at 400 C reveals the presence of to phase. The presence of higher amount of Nb and Zr should have resulted in the formation of ω phase in the T3 alloy at low-temperature aging. © 2004 Elsevier B.V. All rights reserved.