Assuming a proportional relationship between grip strength and what the average male American can lift, back-of-the-envelope math suggests Thanos could heft 120 million pounds, 10 million pounds more than the weight of the Titanic.

Is Thanos physically stronger than Hulk?

Hulk: Who's Stronger? In past conflicts between the two, Thanos has been able to triumph, usually due to either having the Infinity Gauntlet, or using his control over cosmic energy to overpower the Hulk. In a conflict of purely physical strength, though, Hulk may present more of a challenge to the Mad Titan.

How is Thanos so physically strong?

Through bionic implementation and long hours of meditation, Thanos augmented his Eternal strengths and powers so that his abilities surpassed those of all other Titanian Eternals. He's an eternal with a genetic condition that makes him even more powerful than normal.