Recent development of CaF₂:Cu (the most sensitive material for radiation dosimetry) exhibiting a TL glow peak around 270^°C similar to that of CaF₂:Mn has made it attractive to study the influence of heating rate on the response of CaF₂ based TLDs. Influence of heating rate on CaF₂:Mn (known to reduce the response with increasing heating rate) was confirmed in view of the reported controversy about other TLDs. Responses of TL glow peaks around 270^°C in CaF₂:Cu, CaF₂:Tm, CaF₂:Dy and CaF₂:Mn were studied. Except CaF₂:Mn, no other CaF₂based TLD exhibited a reduction in response with increasing heating rate. On the contrary, in some cases a small increase (10–15%) was noted with increasing heating rate from 1^°Cs⁻¹ to 50^°Cs⁻¹.The shape and the position of the glow peak and the parameters derived from the shape of the glow curve appear to have no relation to reduction of TL efficiency at higher heating rates. Apart from the increased probability of non-radiative transitions at higher temperatures, the observed effects have been assigned to the effect of heating rate on the migration of charge carriers released during the TL readout.