With clear inspiration and sound form of expression, the artist animated the "Nuovo Umanesimo" art group with Ugo Capocchini, Emanuele Cavalli, Giovanni Colacicchi, Oscar Gallo, and Onofrio Martinelli in 1947. Their "manifesto" announced their opposition to any concept of abstract art. Late in the 1940s Martini's sculptures won some first prizes at the national level, and early in the 1950s they started to be exposed abroad. Quinto Martini's paintings turned into a mature revision of Ardengo Soffici's style, and experimentation of some of the 20th-century artistic currents including cubism and futurism.