Looking at the young Martini's first experiments, the maestro Soffici recognised the kind of genuine and intimate traits he valued in traditional Italian art.
In February 1927, still under the aegis of Soffici, Martini was invited to participate in the collective exhibition il Selvaggio, together with Mino Maccari, Carlo Carrà, Ottone Rosai, Giorgio Morandi, Achille Lega, Pio Semenghini, Nicola Galante and Evaristo Boncinelli.
There Martini met Felice Casorati, Cesare Pavese and "The Six Painters" group, who were typical interpreters of an anti-fascist and communist-oriented culture inspired by the French Cézanne and Manet.
He used simple and "poor" terracotta, a material typical of his rural environment which was already common in the Seano area when the Etruscans settled and expressed their culture millenniums before.
Quinto Martini participated in the XXth Biennale di Venezia edition, where his work was appreciated by the important Italian critic Giuseppe Marchiori.
In 1974, his second novel Chi ha paura va alla guerra is printed in Catanzaro for the Frama's Publisher edited by Pasquino Crupi, where Quinto Martini tells the story of a deserter during the First World War.
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.
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.
Many portraits were made in terracotta, plaster cast, bronze of his mother, Ardengo Soffici, his wife Maria Ferri, often shown at important exhibitions.
The poets and intellectuals Mario Luzi, Renzo Federici, Tommaso Paloscia, Carlo Levi, many of whom were subjects of the "Portraits" themselves, wrote about these operas hosted again in Palazzo Strozzi in 1978.
"[3] The artist dedicated to Dante's masterpiece a complete set of lithographs which toured in Rome, at the Biblioteca Nazionale Centrale di Firenze, and also in Warsaw and five different cities in the former U.S.S.R. Three books were published on this series of Martini.
The Municipality of Carmignano has instituted the Parco museo Quinto Martini Prize, aimed at emphasizing ideas and projects that are inspired by or intended to combine art and public spaces.