The present study investigates the effect of using nanoparticles of titanium, silicon, and superabsorbent polymer on some biological traits and oxidant enzymes of cumin plants under drought-stress conditions. In this regard, a split factorial experiment was conducted in the form of a randomized complete block design with 3 replications. The availability of water at three levels of 50 mm (control), 100 mm, and 150 mm (dry stress) of evaporation from the class A evaporation pan were considered the primary factor, and the foliar application levels of nanoparticles of titanium, silicon, and the superabsorbent polymer was considered secondary factors. The primary factor was drought stress and the secondary factor was different levels of titanium nano oxide, silicon, and superabsorbent polymer each in 2 levels. The results revealed that the maximum level of carbohydrates (14.29 µmol/g) was observed in drought stress treatment of 150 mm of evaporation from the pan, and the maximum level of leaf proline (6.81 µmol/g) was obtained in the irrigation treatment of 150 mm of evaporation from the pan