Final answer:
The title of the mural created by Diego Rivera in 1950 is 'Dream of a Sunday Afternoon in Alameda Park'.
Step-by-step explanation:
The title of the mural painted by Diego Rivera in 1950 is Dream of a Sunday Afternoon in Alameda Park. This particular mural includes significant historical and cultural figures such as Diego Rivera himself, his wife Frida Kahlo, and the popular figure of La Calavera Catrina, which Rivera took from Posada's famous print and further elaborated upon in his piece. The mural is a vivid reflection of Rivera's experiences and expressions through his grand use of color and impactful subject matter portraying cultural and political history.