The development of models of the physicochemical and biochemical behavior of nanomaterials is useful for improving the evaluation and management of this material. Quasi-SMILES technology makes it possible to quite successfully cope with this kind of modeling task, accounting for various experimental conditions, where the use of other approaches is difficult or even impossible. Here, we describe the results of using quasi-SMILES to model the toxicity of mixtures of titanium nano oxide with various inorganic substances towards Daphnia magna. The approach is based on the stochastic process of the optimization of correlation weights for different codes used in quasi-SMILES. The optimization process was carried out using special statistical criteria for predictive potential. It is shown that models built using quasi-SMILES have the best predictive potential.