Utilize the input text as a context reference, choose the right relationship between 'Ternium' and 'steel' from the options.
Options: product/material produced, parent organization, chief executive officer, operator

In contrast, our blast furnaces in Brazil and Argentina were able to keep operating as they reduced production to technical minimums and increased shipments to other Ternium facilities in the region, which in turn adjust their steel procurement and production lines.
product/material produced