The crystalline structure of $LaTi_{0.8}V_{0.2}O_3$ solid solutions, prepared by arc-melting palletized mixtures of predried $La_2O_3,;V_2O_3,;TiO_2$, and Ti, was investigated by transmission electron microscopy and computer image simulation. Computer image simulations were performed by the multislice method for a wide range of sample thickness and defocusing value. The structure of $LaTi_{0.8}V_{0.2}O_3$ was determined as a $GdFeO_3$-type orthorhombic $(aapprox5.58{AA},;bapprox7.89{AA},;and;capprox5.58{AA})$ with a space group $P_{nma-}$. No evidence of ordering of Ti and V atoms in $SaTi_{0.8}V_{0.2}O_3$ was found.