These files form the open data deposit for the article; Tuning spin–orbit torques at magnetic domain walls in epitaxial Pt/Co/Pt1−xAux trilayers, by Aleš Hrabec, Kowsar Shahbazi, Thomas A Moore, Eduardo Martinez and Christopher H Marrows, published in Nanotechnology. The data is collected into an Origin file (DW_velocities.OPJ), from which figures 2 and 3 of the paper were generated, and two .zip files (Au.zip and Au50Pt50.zip), which contain the raw data for the Pt/Co/Au and Pt/Co/Pt50Au50 epitaxial trilayer that was analysed to produce the experimental data points in these figures.