Titanium (Ti) alloys are strategic aerospace materials used in relatively severe working environment. Owing to the excellent properties such as high rigidity to weight ratio, elevated temperature strength, corrosion resistance and toughness in ambient as well as cryogenic environment, Titanium alloys find high technology applications in aerospace industries. As the Ti alloy finds application in aircraft engines, compressor blades and gas turbines, it is necessary to characterize the performance of this material under stress conditions. Acoustic Emission (AE) is a high sensitivity technique for detecting active microscopic events in a material under stress. The processes that are capable of changing the internal structure of a material such as dislocation motion, directional diffusion, creep, grain boundary sliding and twinning which are usually associated in plastic deformation and fracture are the sources of Acoustic Emission. Thus, using AE signals, it is possible to evaluate the performance of material under stress. The data acquired can be used to predict the performance of products made of Ti alloy. With this view, the acoustic emission response of Ti alloy subjected to tensile testing under ambient and cryogenic conditions have been studied.