The study was based on understanding the relationship between titanium (Ti) doping amount and magnetic heating performance of magnetite (Fe₃O₄). Superparamagnetic nanosized Ti-doped magnetite ((Fe_1−x,Ti_x)₃O₄; x = 0.02, 0.03 and 0.05) particles were synthesized by sol-gel technique. In addition to (Fe_1−x,Ti_x)₃O₄ nanoparticles, SiO₂ coated (Fe_1−x,Ti_x)₃O₄ nanoparticles were produced as core-shell structures to understand the effects of silica coating on the magnetic properties of nanoparticles. Moreover, the magnetic properties were associated with the Néel relaxation mechanism due to the magnetic heating ability of single-domain state nanoparticles. In terms of results, it was observed that the induced RF magnetic field for SiO₂ coated (Fe_0.97,Ti_0.03)₃O₄ nanoparticles caused an increase in temperature difference (ΔT), which reached up to 22 °C in 10 min. The ΔT values of SiO₂ coated (Fe_0.97,Ti_0.03)₃O₄ nanoparticles were very close to the values of uncoated Fe₃O₄ nanoparticles.