After First World War and the annexation of Trento and Trieste to Italy, it absorbed the "Società degli Alpinisti Tridentini" and the "Società Alpina delle Giulie".

[2][3] Its most famous achievement is the 1954 Italian Karakoram expedition to K2 that made the first successful ascent of K2.

[4] Among many other publications the Club Alpino Italiano, along with Touring Club Italiano, published between 1908 and 2013 the Guida dei Monti d'Italia (in English Guidebook to the Italian mountains), a series of guidebooks covering all the mountain ranges of Italy.

Italian military troops adopted a grey-green uniform during World War I. Luigi Brioschi, president of the Milanese section of the C.A.I.

Brioschi demonstrated that the grey uniforms were less visible by opponent snipers, therefore, the project was financed.