¿Who is stronger, Thanos or Colossus?

Thanos is a powerful and malevolent character from the Marvel Universe, first appearing in the Marvel Comics series "The Invincible Iron Man" in 1973. He is a powerful alien warlord from the planet Titan, and is one of the greatest threats faced by the Marvel Universe. Thanos' story begins on the planet Titan, where he was born as the son of Eternals A'Lars and Sui-San. From a young age, Thanos was obsessed with death and the pursuit of power, and he quickly rose through the ranks to become one of the most feared and respected figures in the Marvel Universe. As a result of his Eternal heritage, Thanos possesses a number of superhuman abilities, including strength, speed, agility, durability, and regenerative powers. He also has access to advanced technology, including a suit of armor that enhances his physical abilities and a number of powerful weapons, such as the Infinity Gauntlet. The Infinity Gauntlet is a powerful artifact that allows Thanos to manipulate time, space, and reality itself. With it, he is able to erase entire galaxies from existence, and has even been able to defeat some of the most powerful beings in the Marvel Universe. Throughout his long and storied career, Thanos has clashed with many of the Marvel Universe's greatest heroes, including the Avengers, the Guardians of the Galaxy, and the X-Men. Despite their best efforts, these heroes have often struggled to defeat Thanos, making him one of the most formidable and dangerous villains in the Marvel Universe.

Colossus, also known as Piotr Nikolaievitch Rasputin, is a superhero from Marvel Comics who first appeared in Giant-Size X-Men #1 in 1975. Created by writer Len Wein and artist Dave Cockrum, Colossus is a member of the X-Men and one of the most powerful mutants in the Marvel Universe. Colossus' superpowers and strength are closely tied to his ability to transform his entire body into a form of organic steel. When in his steel form, Colossus gains incredible strength and durability, making him one of the strongest beings in the Marvel Universe. He can withstand powerful physical attacks, and his steel skin makes him impervious to most forms of harm. One unique aspect of Colossus' powers is that he can transform back and forth between his human form and his steel form at will. While in his human form, he retains his normal strength and abilities, but when he transforms into his steel form, he gains incredible power and durability. Colossus' origins are closely tied to those of the X-Men. He was recruited by Professor Xavier to join the team of mutants who were trained to use their powers for good. Despite his gentle nature, Colossus quickly became known for his incredible strength and courage, using his powers to fight against various villains and threats. Throughout his career, Colossus has had many memorable moments, including his romance with fellow X-Man Kitty Pryde, his leadership role in various X-Men teams, and his pivotal role in many Marvel Universe events. Overall, Colossus' superpowers and strength make him one of the most iconic mutants in the Marvel Universe. His ability to transform into organic steel gives him incredible power and durability, making him a formidable opponent for even the strongest villains.