The Metalworkers' Federation (French: Fédération des travailleurs de la métallurgie, FTM) is a trade union representing workers in the metallurgical industry in France.
[1] In 1921, about half the union's membership split away, joining the United General Confederation of Labour (CGTU).
The CGTU unions rejoined in 1936, and this led to rapid growth for the union, with membership reaching 832,000 by 1937, and for the first time, the FTM became the largest trade union in France, leapfrogging the National Federation of Miners, Railway Workers' Federation, and National Federation of Textile Workers.
[1] Much of the union was involved in the French resistance, although a minority, led by Marcel Roy, collaborated.
In 1945, the union renamed itself as the Metalworkers' Federation of France and the Colonies, and by 1947, it claimed 900,000 members.