A method of manufacturing a heating chamber (100) for an aerosol generating device (200) includes the steps: providing a metal tubular member (10) comprising a tubular side wall (11) with an open end (12); the tubular side wall having a thickness of no more than 0.15 mm; inserting the tubular member into a tubular mould (20), the inner surface of the tubular mould having a shaping profile with at least one protrusion (17, 19) or recess; sealing the open end of the tubular member; and injecting a fluid under pressure into the tubular member to outwardly deform the tubular member such that it conforms to the shaping profile of the surrounding tubular mould. By using a fluid pressure to shape the tubular member, a required profile shape can be transferred to the tubular member with high precision, while maintaining the thickness of the chamber walls below 0.15 mm to provide efficient heat transfer to a consumable during use.
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