The fatigue crack growth life in titanium alloy PT-3 V (pseudo-α structure) under constant amplitude loading has been investigated. The influence of different load levels and R-ratio on fatigue crack growth in the above titanium alloy is considered. Experimental data of fatigue crack growth kinetics under this type of loading have been obtained. The analysis of crack growth kinetics depending on material properties, the study of obtained crack growth life diagrams and fractographic features of crack propagation is carried out. The analysis of the crack growth kinetics, depending on the properties of materials and the nature of variable external exposures, was carried out based on the study of the obtained fatigue fracture kinetics diagrams (henceforth FFKD). The effect of the asymmetry on crack growth is estimated. Mechanisms of such crack behavior and modeling of crack propagation are discussed.