AIP Conference Proceedings [Author(s) ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2016: Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016 - Tomsk, Russia (19–23 September 2016)] - The structure and phase composition of the surface layer of the samples during the processing of VT-10 titanium alloys by copper ions