Naruto could use his shadow clones. He could create multiple clones while being tortured. The clones could then create a distraction, allowing Naruto to break free from his restraints. For example, the clones could start a fight among the captors, or they could cause an explosion.
In a fanfic, Naruto could be captured by a hidden organization that opposes the Hidden Leaf Village. They might torture him to find out the village's secrets. For example, they could be interested in the location of the Hokage's secret vault or the techniques taught only in the Leaf. Naruto, being strong - willed, would resist as much as he can, but the continuous torture would gradually wear him down.
One way Naruto could survive is by using his Jinchuriki powers. Even in a tortured state, he might be able to draw on the power of the Nine - Tails to heal himself or resist some of the more severe forms of torture. Also, his training with Jiraiya and others has made him physically and mentally tough. He could use the skills he learned, like the Rasengan, in a defensive way if the torturers get too close. His memories of his friends and the promises he made to them would act as a psychological shield against the continuous pain.
Another way is that he forms an unexpected alliance within Iwa. There could be a dissident group in Iwa who oppose the capture of Naruto. They might help him escape in exchange for some future favor or because they believe in Naruto's cause. Naruto has a way of inspiring people, even those who are initially his enemies, so this is a plausible scenario.
Well, Naruto might escape by using his wits. He could pretend to be compliant with Orochimaru's plans at first, gain Orochimaru's trust a little bit, and then when Orochimaru least expects it, he could make his move. He could also find an ally within Orochimaru's lair. Maybe there's a henchman who has a change of heart and helps Naruto escape. Or, Naruto could discover a weakness in Orochimaru's security system or jutsu that he can exploit to get away.
The Hidden Stone Village might be the captors in some fanfictions. If there was a political struggle or a misunderstanding, they could see Naruto as a weapon of Konoha that needs to be neutralized. Their earth - style jutsus could be used to create inescapable prisons for Naruto, and they might use various interrogation techniques as torture to find out Konoha's secrets.
Naruto could use his shadow clones to create distractions. He could make a large number of clones and while the Akatsuki members are dealing with the clones, he could find an opening to escape. Also, he might be able to tap into the power of the Nine - Tails more than ever before in a desperate situation, using its strength to break free from any restraints.
In such a fanfiction, one possible plot could be that Naruto is captured by a powerful and vengeful enemy, like Orochimaru. Orochimaru might want to extract the Nine - Tails' power from Naruto. He could use various dark jutsus to torture Naruto physically and mentally, trying to break his will. Naruto, being the determined shinobi he is, would fight back in his mind, not giving in easily.
Yes, there might be some fanfictions that handle such themes in a non - graphic and appropriate way. For example, some may focus on the emotional and mental struggle Naruto goes through during his 'captivity' rather than on torture in a violent sense. These can be more about his journey to overcome adversity and grow stronger.
Among the search results provided, several novels about the torture of ancient generals were recommended. Among them were The Return of the King, Princess Jue Ao, and After I Was Captured by the Deceiving Emperor of the Enemy Kingdom. These novels told the story of the female protagonist being a general of an enemy country and being captured, and may have contained torture scenes.
Percy might try to find Voldemort's Horcruxes and destroy them. This would weaken Voldemort and give Percy a better chance to escape. He could also use his demigod speed and agility to outrun Voldemort's spells and find a way out of the dark wizard's lair.