Along with new trends, the manufacturing industry is also forced to move forward. Therefore, we focused on the use of Waterjet Peening technology - WJP. With the help of this technology, we can strengthen the material (harden) and remove residual stresses. This technology uses high pressure of water jet. Parameters also play an important role, namely the distance of the nozzle from the material being machined, the working pressure is standing, the feed rate, the number of cycles, etc. WJP technology is also promising from an ecological point of view, no harmful substances are formed during machining. Studies have also shown that, there are no heat affected zones during machining. When comparing the mentioned technology on samples made of surgical steel and titanium alloy, it was shown that the sample made of surgical steel showed greater signs of corrosion traces. Based on an experimental comparison of WJP technology and shot blasting technology, it is shown that the technologies achieved relatively the same results in terms of residual stress removal. A significant difference was found on the surface of the material, in the form of the degree of surface damage. With the help of WJP technology, the material did not reach such a roughness level as after shot blasting technology.