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The current work used chitosan (CS)‐nTiO₂ nanocomposites (CTNCs) prepared with different CS:nTiO₂ mass ratios toward the MB dye removal from an aqueous medium in batch method at variable experimental conditions. The stability and competence of the nanocomposites were checked through characterization by SEM, FTIR, XRD, TGA, and BET. The highest removal of MB was 78 % with the adsorbent CS without nTiO₂ (CWT), 94.5 % with CS:nTiO₂=1 : 1 weight ratio (CTNC1‐1) and 80 % with CS:nTiO₂=2 : 1 weight ratio (CTNC2‐1) with 10 mgL⁻¹of MB and 5 gL⁻¹ adsorbent dosages. The experimental observations obeyed the pseudo‐2^nd‐order model, and rate‐limiting steps were film diffusions for CWT, CTNC1‐1 and intraparticle diffusion for CTNC2‐1. Monolayer adsorption was established from the isotherm model. Langmuir adsorption capacities for MB were presented as CTNC1‐1 (q_L=34 …