Why in the redox titration of KMnO₄vs oxalic acid, we heat oxalic acid solution before starting the titration?

We heat oxalic acid solution because without heating it is a slow process as an energy greater than the activation energy is required for a reaction. So in order to increase the energy, temperature must be increased which is only possible by heating the oxalic acid solution. So, when the temperature increases molecules having energy greater than activation energy also increases which increases the rate constant of a reaction.