44560 2018 eng 326, 1 10 4 124 article Springer-Verlag 1 -- -- -- Commercial grade-1 titanium samples (Ti, 99.6%) were treated using three alternative methods, (i) femtosecond laser processing, (ii) thermal heat treatment, and (iii) electrochemical anodization, respectively, resulting in the formation of differently conditioned superficial titanium oxide layers. The laser processing (i) was carried out by a Ti:sapphire laser (pulse duration 30 fs, central wavelength 790 nm, pulse repetition rate 1 kHz) in a regime of generating laser-induced periodic surface structures (LIPSS). The experimental conditions (laser fluence, spatial spot overlap) were optimized in a sample-scanning setup for the processing of several square-millimeters large surface areas covered homogeneously by these nanostructures. The differently oxidized titanium surfaces were characterized by optical microscopy, micro Raman spectroscopy, variable angle spectroscopic ellipsometry, and instrumented indentation testing. The tribological performance was characterized in the regime of mixed friction by reciprocating sliding tests against a sphere of hardened steel in fully formulated engine oil as lubricant. The specific tribological performance of the differently treated surfaces is discussed with respect to possible physical and chemical mechanisms. Applied Physics A 10.1007/s00339-018-1745-8 0947-8396 1432-0630 urn:nbn:de:kobv:b43-445609 12.04.2018 Creative Commons - CC BY - Namensnennung 4.0 International Sabrina V. Kirner Nadine Slachciak Anna Maria Elert Michael Griepentrog Daniel Fischer Andreas Hertwig Mario Sahre Ilona Dörfel Heinz Sturm Simone Pentzien Robert Koter Dirk Spaltmann Jörg Krüger Jörn Bonse eng uncontrolled Femtosecond laser eng uncontrolled Titanium eng uncontrolled Oxidation eng uncontrolled Friction Ingenieurwissenschaften und zugeordnete Tätigkeiten Angewandte Physik Verlagsliteratur Datei für die Öffentlichkeit verfügbar ("Open Access") Wissenschaftliche Artikel der BAM Bundesanstalt für Materialforschung und -prüfung (BAM) https://opus4.kobv.de/opus4-bam/files/44560/2018-Kirner-APA124_326.pdf