Effect of adding titanium oxide nanoparticles (TiO 2 ) on structure, elastic moduli, Vickers hardness, internal friction, electrical resistivity and thermal properties of tin-antimony-lead and tin-aluminum bearing alloys have been investigated. Elastic modulus, Vickers hardness and thermal diffusivity of Sn 87 Sb 10 Pb 3 and Sn 80 Al 20 alloys increased after adding TiO 2 nanoparticles. Internal friction, thermal conductivity and specific heat of Sn 87 Sb 10 Pb 3 and Sn 80 Al 20 alloys varied

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... ter adding TiO 2 nanoparticles. Adding titanium oxide nanoparticles improved bearing properties, such as strengthens and internal friction of Sn 87 Sb 10 Pb 3 and Sn 80 Al 20 alloys. The Sn 85.5 Sb 10 Pb 3 (TiO 2 ) 1.5 alloy has best properties for automotive industry. Also Sn 78.5 Al 20 (TiO 2 ) 1.5 alloy has best properties for marine applications.