I've seen quite a few stories with his type of scenario, but have yet to continue, so I decided to write my own!

The idea of Thanos taking Tony to Wakanda with him is interesting because it opens up a different path for all the characters to take.

THE TITAN'S CAPTIVE

CHAPTER ONE

TITAN

The Gauntlet hand rested on his head, heavy upon his skull, but holding him gently. He had trouble breathing as Thanos loosened his hand upon the sword still embedded within Tony's left side. Pierced through his body in one swift stroke, the Titan had driven it in further as he'd pushed Tony back to sit on the rocks behind him. The Titan gently titled Tony's head back. Reluctantly, he raised his eyes to stare into the orbs of the one that had killed him.

"You have my respect, Stark," said Thanos, gently. "When I'm done, half of humanity will still be alive."

He was shoved back, the movement pulling at the wound. Tony whimpered, struggling to breathe, still winded. Pain coursed through his body and he spat out blood.

"I hope they remember you."

Tony looked up.

Thanos had raised the Gauntlet, the four stones embedded within it, all glowing in unison. The Titan tilted his head to the side, as if contemplating his next action.

Turning his head away, Tony waited for the inevitable. He hoped it would be quick. He doubted it would be painless.

"STOP!"

Tony lifted his head and looked at his companion.

Strange was getting himself into a sitting position, looking defeated. There was a pause as Thanos looked at the wizard. "Spare his life."

No… Don't let him win to save me.

"And I will give you the stone."

The Gauntlet was still pointed at Tony. "No tricks." The Titan's demands were simple.

Strange shook his head.

The Gauntlet moved to point at the wizard.

"Don't!" Tony didn't want this. If Thanos killing him meant he lost then he'd rather die.

But Tony's plea didn't stop Strange.

The green stone materialised into the air, summoned by the wizard and Strange floated it towards Thanos, watching the Titan intently.

Thanos took the stone between his fingers, looking down at Tony before inserting the stone into the thumb slot of the Gauntlet.

Tony couldn't help but watch as Thanos shuddered as power visibly engulfed him. He seemed to grow stronger and Tony's danger sense went through the roof. This wasn't over.

Thanos smiled. "One to go…"

Then, from over a ridge, Quill came, propelled by his jet boots, towards Thanos, firing quickly, before Thanos stepped aside, lashing out at the man, sending him sprawling into the dirt, dazing him, with a quick fist to his face.

"A shame you still resist. You've lost."

Quill did not move, but Tony would see the rise and fall of his chest.

"I thank you, Wizard, for you generous exchange for the stone."

Thanos' expression did not make Tony feel any better, not when the Titan moved towards him, reaching out to place his hand upon Tony's head. The Gauntlet fingers stroked through his hair; Tony's breathing stilled, terror flooding his body.

Attempting to pull away did no favours.

Thanos gripped his head hard.

Strange was on his feet. "There is no trick. You said you'd spare his life."

Thanos chuckled.

The sound terrified Tony.

"I didn't promise to leave him here, did I?"

Tony's eyes widened. "No! Do-"

And he felt Thanos drag him back by the skull into a portal. His vision swam and the last thing he saw was Strange's horrified expression.

And Tony knew that whatever plan Strange had, had failed.

WAKANDA

Steve could sense the change in the air. A few leaves fell from the trees, scattering down in front of him. His hair whipped back from the breeze as it grew stronger. Moving his hand to the com-device in his ear, Steve issued a command. "Everyone on my position. We have incoming."

It only took brief seconds for them to arrive at Steve's position. They had all been rushing to save Vision: Steve, Sam, Wanda, Rhodey, Bruce in the Hulkbuster, Natasha, Bucky, T'Challa, Okoye, Groot and the racoon. They were united in one common goal.

Then the wind become more intense towards a certain spot in the forest and a dark blue cloud appeared.

Steve clenched his fist tighter, aware that everything had been heading towards this.

A figure stepped through, taller than any of them, his skin purple, his muscles bulging, and as the cloud disappeared around them, Steve's eyes zeroed in, not on Thanos, but at the figure he clutched by the head, held by the Gauntlet hand.

"Tony…" Steve breathed.

He heard similar intake of breaths around him.

Tony's expression was bunched up in pain, as if he was just waking up. His eyes were fluttering and he could see he was becoming more aware of his surroundings. Tony's face was bloody and the suit partially ripped from him, but what made Steve gasp in horror was the sword, still embedded through the man's abdomen, skewing him through. There was blood dripping from his mouth. Every gasp of air caused pain.

"This is what happens to those that resist me," stated Thanos, squeezing Tony's head.

Tony cried out.

"Leave him alone." Steve stepped forward, his expression hard.

The Titan smirked. "Why should I when he obviously means something to you?" The Titan moved Tony's head up. "He fought well. The other Stone-Keeper gave me his in return for this one's life. I wonder what you will do."

Steve panted, looking at the others. He dare not attack, not with Tony in the hands of their enemy. "We will never give you the stone."

"Really?" Thanos cocked his head to the side. "No matter what I do to him?" One stone in the Gauntlet activated: the purple one brightened and Tony started to scream. His body flayed in the Titan's grip and more blood spurted from his mouth and where the sword was, it lodged in further.

It lasted barely ten seconds.

"Will you not reconsider?"

Steve glanced at the others. One of their own was being used against them. They couldn't let Vision die, but equally they couldn't allow Thanos to have Tony either. Vision's own gaze was fixed on Tony's limp and bloody body.

Tony coughed up more blood. His brown eyes focused on Steve.

They hadn't spoken in a few years.

"St….St…Steve…" Tony managed, breathless, his face still contorted in pain. "Do… Do… Don't…"

Steve swallowed. "Tony…"

"I'm waiting for your answer," interrupted Thanos, darkly.

Steve steeled his gaze, clenching his shield closer to his body. "We do not trade lives." It was what Tony wanted.

"A pity." The Titan settled his gaze upon them all.

Feeling unnerved, Steve stepped back towards Vision.

"I would hate to hurt him more," said Thanos, moving his Gauntlet-free hand to touch Tony's bloody cheek, gently stroking the skin there.

Tony shuddered and tried to move his head away.

"He has my respect. It will be a pity to kill him…"

"If he has your respect, then why use him against us?" Natasha asked, her voice hard and unforgiving.

"Because you have what I want. One life for a life. Only one of you here has the right to make that choice." Thanos' eyes focused upon Vision. "But if you choose to protect him, then this one here," he shook Tony, "will suffer."

Steve saw Tony shake his head. "No."

Thanos' expression turned dark. "Then, he shall suffer."

And the Titan was gone, dragging Tony with him, away through a portal he conjured behind them.

Steve leapt forward but fell through the smoke on to the forest floor. He looked around at the others. Rhodey's face was pale, and Bruce looked visibly shaken by what they had just witnessed. Steve couldn't rise from his position on the earth. "Oh god. What have I done?"

To be continued...

Please let me know what you think!

Tony wouldn't want Vision to sacrifice himself for him. I think Steve made the right choice. But Thanos is not finished with Tony or the Avengers yet.

More soon.