[en] A partial polythermal section of the Ti-Al-Zr-Sn-Mo-Si alloy system has been constructed with a constant Al-, Zr-, Sn-, Mo (21%) content and varying within 0 to 3% content of silicon. In the system alloys the phases α, β, α₂(Ti₃Al), sigma (Ti₅Si₃) and the two-, three- and four-phase regions corresponding to above phases exist. At temperatures of 1020- 1010 deg C the alloys of the section undergo the transformation in solid state connected with the transformation in the binary Ti-Si (β→α-Ti₅Si₃) system. The specific electric conductivity of quenched alloys decreases with silicon concentration increase from approximately 1.85-1.95 down to approximately 1.6-1.7x10^-4 ohm.cm. The hardness values of the alloys increase with the silicon additions from 310 to 360 kg/mm² (600 deg C)