Hawkeye's Katana is a sword primarily used by Clint Barton to assassinate criminals who had survived the Snap. Following his return to the Avengers, Barton used the katana to fight against Thanos' army during the Battle of Earth.
Deciding to enact vengeance on criminals who survived the Snap when innocent people had died, Clint Barton adopted the moniker of Ronin, donning a samurai-inspired guise and wielding a katana. For five years, Ronin went all over the world, tracking down criminals and massacring them, leaving horrendous scenes with his katana.
In 2023, Ronin made his way to Tokyo to eliminate the Yakuza, led by Akihiko. With great ease, Ronin cut through multiple enemies, despite them firing rapidly at him. Ronin then made his way to Akihiko, causing the two to end up on the streets. The two then began to duel, although Ronin managed to get the upper hand on him, slitting his throat. Akihiko then begged for mercy, but Ronin finished him off by fatally impaling him and then wiped the blood off his katana.
When Hawkeye and Black Widow were sent back in time to Vormir in 2014, Barton equipped himself with his katana. When the two made their way to the top of the mountain, they were alerted by the presence of Red Skull, causing Hawkeye to draw out his katana. However, Red Skull posed no physical threat, so the two holstered their weapons.
When the New Avengers Facility was destroyed, Hawkeye found himself in the undergrounds of the facility, along with a horde of Outriders. After Hawkeye set off some explosive arrows to defeat the Outriders, he found himself unsuccessful, causing him to retreat upwards with his Wristbow. As he went upwards out of the tunnels, several Outriders continued to chase him, causing him to draw out his katana and slice all the incoming Outriders as he made his way to the top.
Later when Hawkeye was running through the battlefield protecting the Nano Gauntlet, he was surrounded by several forces of Thanos' army. Hawkeye continued to charge through, fighting off any incoming enemies with his katana, as he was only able to use one hand. He would later continue to fight until all the enemies were defeated by Iron Man.
Hawkeye's katana displays a rather interesting construction, similarly towards a modern katana appearance. However, the katana does not have a fuller or back bevel. The entire back section of the blade is nearly empty with the exception of a series of vertical bars, rendering it little more than its cutting edge.