Local crack growth evaluation in a fully lamellar Ti-6Al-4V alloy using an electrothermal Crack-Tip marking technique

•Local data from multiple orientations at once in anisotropic triplet microstructure.•Electrothermal crack tip marking process used to record multiple crack fronts.•3D analyses performed to evaluate local stress intensity factor.•3D anisotropic crack growth resistance interpolation function collapses data.•3D anisotropic crack growth model obtained for octahedral triplet colonies in Ti-6-4.