Tribological performance of sub-100-nm femtosecond laser-induced periodic surface structures on titanium

- Large areas covered with sub-100 nm LIPSS (HSFL) were manufactured by fs-laser irradiation on titanium surfaces.
- Tribological performance of HSFL covered areas was qualified in reciprocal sliding tests in two different lubricating oils.
- HSFL on titanium do not endure the tribological tests.
- For a beneficial tribological performance, the tribological sample deformation must be smaller than the LIPSS modulation depth.