<p>The phase relationships in the Er-Fe-Ti ternary system at 1173&#xa0;K have been investigated by means of x-ray diffraction and scanning electron microscopy. The presence of a new ternary compound ErFe₉Ti₂ was observed at the studied temperature. Another ternary compound, ErFe₁₁Ti, was confirmed along with six binary compounds, namely ErFe₁₁Ti, TiFe₂, TiFe, Er₂Fe₁₇, Er₆Fe₂₃, ErFe₃, and ErFe₂. The solid solubility of Er in TiFe₂ is 3.0 at.%, and that of Ti in Er₂Fe₁₇ is 5.5 at.%. ErFe₁₁Ti and ErFe₉Ti₂ exhibit notable solid solubility ranges at 1173 K, with compositions varying approximately within ErFe_11-xTi_1+x (x = − 0.4 to 0.5) and ErFe_9+xTi_2-x (x = 0 to 0.2), respectively. Structural characterization of the ErFe₉Ti₂ compound showed that it crystallizes in the tetragonal <i>P</i>4<i>/mbm</i> space group. The ErFe₉Ti₂ phase exhibits lattice parameters of a = b = 0.82010(1) nm and c = 0.48026(5) nm.</p>