Abstract.This study determines the appropriate enhanced safety, surface-processing methods for local Sivas travertines used on barefoot wandered surfaces on which the slip angle is expected to be wide. Slip angle, which is an important parameter for the use of surface-processed travertines as surface-covering material, was analyzed by applying the standard DIN 51097, “Determination of characteristics of barefoot wandered wet places that prevent slipping.” Then, surface roughness parameters of this surface treated travertines have been determined according to DIN EN ISO 4287 standard. This study uses the inclined plane method to calculate, according to different sizes and surface-processing techniques, the slip angles of travertines. The parameters affecting the slip angle values of travertines were determined to be surface-processing techniques, surface roughness and plaque sizes. Travertines were taken into consideration depending on DIN 51097 Standard and were categorized in accordance with safe field of use.Keywords: Travertine, Ramp Slip Test, Slip Angle, Surface-Processing, Surface Roughness