A composite wind turbine blade is partially thick-walled to comply with high strength criteria. When the manufacturer’s recommended cure cycle (MRCC), which is designed for thin-walled components, is used for thick-walled components it can lead to high levels of residual stress. This experimental research investigates different cure cycles for thick-walled glass-fibre epoxy composites made by vacuum infusion with the objective of minimising residual stresses and cycle time. It is found that a two-dwell cure cycle with a low second dwell temperature will significantly decreases the exothermic peak temperature, increases the maximum shear stress, decreases the acoustic emission activity and reduces time compared to the single dwell MRCC.