Tribology is a multidisciplinary field by nature which is the interaction between surfaces (including lubrication, lubricating oils and greases, contact mechanics, friction, wear, surface damage, surface modifications and coatings) can only be completely understood when considering the physics, chemistry, mechanics and materials of the interaction. The majority of the papers are for practical work. It will have the possibility to be discussed for experimental results obtained from the research carried out not only in Turkey, but also from variable companies, reseach center and many universities participating from different countries in the Turkeytrib'18.