ABSTRACT Improvement of the mechanical and tribological properties of the machinery parts using superficial protection is one of the main problems of materials science. The use of ceramic coatings in the industry increases the reliability of existing machinery techniques, reducing its maintenance cost and extending its lifetime. One of the most powerful technologies in this field is the thermal spraying of powders. The reduction of particle size of a powder used to manufacture the coatings to the submicrometer or nanometer levels significantly improves tenacity, hardness, and wear resistance. There are many thermal spraying techniques. However, due to a number of reasons, in many cases suspension plasma spraying (SPS) is the only technique developed up to now that allows to inject sub-micrometer to nanometer-sized particles directly by using a liquid carrier medium.It is a versatile technique easily adapted to industrial applications and possessing lower economical cost that permits to obtain ceramic coatings of different compositions. This work shows a study of microstructural and mechanical properties of alumina- titanium ceramic coatings (87% Al2O3 and 13% TiO2) obtained by SPS using submicrometer and nanometer powders as supply materials. Two spraying techniques have been used in order to obtain the coatings: atmospheric plasma spraying (APS) and suspension plasma spraying (SPS).It has been possible to obtain a coating that contains nanometer scale microstructures only by means of SPS. It has been demonstrated that the properties of the investigated materials, such as hardness, elastic module and wear resistance, increase with the reduction of the particle size of the supply materials. The detailed study of the microstructure and phase composition of coating allows us to conclude that they are the only reasons of enhancement of the tribological and mechanical properties.