Utilize the input text as a context reference, choose the right relationship between 'Alcoa' and 'aluminium' from the options.
Options: legal form, position held, industry, product/material produced

The increase in primary aluminium production at the smelter to 420,000 tonnes per year could bite into markets also supplied by rival Alcoa (NYSE: AA - news ) and other producers struggling with softer revenue caused by weak prices and rising exports from China.
product/material produced