SYDNEY, Oct 30 (Reuters) - Alcoa ( AA ) is "very

bullish" on aluminium as the energy transition drives demand

growth, including substitution away from copper, CEO William

Oplinger said on Wednesday.

"As we look forward, demand growth will be driven by this

energy transition," he said, adding that as demand outstrips

supply for copper, demand for aluminium will grow because it is

a ready substitute in some applications, he told a conference in

Sydney.

Megatrends are driving aluminium demand of

3%, 4%, and 5%

every year, he said.

"Couple that with some supply changes in the industry,

for instance the Chinese sticking to a mandatory cap they have

put in place ... that shapes up to a much stronger aluminium

market globally," he said.