Аннотация:Life duration for titanium disks of low temperature part of compressor aero-engine D30-Ku is investigated. Several criteria and models are tested under conditions of low-cycle fatigue (LCF) and very-high-cycle fatigue (VHCF). Parameters of the criteria and models are determined from uniaxial fatigue tests for titanium alloy VT3-1. Stress-strain state of disks and blades is calculated taking into account cyclic centrifugal, aerodynamic, contact loads and blade vibrations. Calculated stresses and strains are used as input data for multiaxial models of LCF and VHCF regimes. Location and scales of fracture as well as time to fracture are calculated. The results of calculations are in good agreement with observations during engine exploitation and correspond to data of fractographic investigations of damaged disks.