This article is devoted to modification of aluminum melt by zirconium, titanium and boron addition. Addition effect on the macrostructure and mechanical characteristics was studied. It was determined that titanium has a much more modifying effect in the examined range of concentration. Its influence is saved up to 0.2 wt. %. Boron and zirconium have less modifying effect. Test results of mechanical characteristics demonstrated that titanium addition into melted aluminum increases greatly the tensile strength level. Boron and zirconium have minor influence. Furthermore the combined modifying additions were added into aluminum melt and their influence on the macrostructure and mechanical properties of aluminum was studied. It was established that the complex titanium/boron modifying addition has significant influence on the macrostructure and mechanical properties of aluminum. It was found the much less amount of combined addition is required to grain size refinement than when one element (Ti, Zr or B) is used.