Anisotropy of elasticity and dislocation inelasticity in titanium

Elastic and inelastic properties are studied under quasistatic loading-unloading in the range of elastic strain of VT1-O titanium both as received and after rolling with 20 and 40 % reduction. In the range of elastic strain a loop of mechanical hysteresis is observed that is due to reversible dislocation motion, this mechanism is identified by the value of an oscillation decrement/secant elastic modulus defect ratio. Critical stresses of breakaway of dislocations from pinning centers in initial and rolled specimens are estimated. An average distance between points of pinning of dislocations is determined. This distance equals to 0.7-1 μm in as received specimens and ∼ 0.3-0.9 μm in rolled specimens with 40% reduction in area