<i>In situ</i> TEM characterisation of dislocation interactions in α-titanium

<i>In situ</i> straining in the transmission electron microscope and diffraction-contrast electron tomography has been applied to investigate dislocation interactions in <i>α</i>-Ti. Dislocation debris, in the form of small loops, was seen to form from sequential cross-slip events. Electron tomography provided direct three-dimensional visualisation of the dislocation structures, allowing accurate identification of slip planes, dislocation line directions and spatial relations between dislocations.