The plant was established as
Ilmenittsmelteverket on 21 December 1983 as a replacement after
Det Norske Nitridaktieselskap closed its aluminum plant in Tyssedal. Production commenced in 1986. In 1988 it was bought by
Tinfos Jernverk and renamed
Tinfos Titan & Iron. In 2008 Tinfos was bought by
Eramet, giving the plant its current name. In May 2020 Eramet announced the sale of the plant to
Tronox. The sale was later abandoned (2021), in part due to an investigation by the UK CMA. On 22 September 2023, Eramet sold the plant to
Ineos Enterprises for $245 million. The plant was renamed INEOS Tyssedal. The deal also included a long-term supply contract for ilmenite produced by Eramet's Senegalese
Grande Côte Opérations. ==References==