Comic version probably tanks it.
Live action who knows. Scientists have never reached absolute zero, I don't think. Metals are treated with liquid nitrogen which makes them tougher. Liquid nitrogen isn't that far off from absolute zero. 150 or so degrees F.
That's actually quite a ways off. Absolute Zero is also something that in theory could never happen, as it's a point at which infinite heat is required to raise it's temperature by 1 degree. The freezing process also makes the subject more brittle as it reduces the amount of flex an object has simply by the nature of freezing something.
According to Science Daily the prereqs for absolute zero aren't that extreme. Scientists have actually gotten pretty close.
Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance.
Absolute zero is the point at which the fundamental particles of nature have minimal vibrational motion, retaining only quantum mechanical, zero-point energy-induced particle motion.
By international agreement, absolute zero is defined as precisely; 0 K on the Kelvin scale, which is a thermodynamic (absolute) temperature scale; and –273.15 degrees Celsius on the Celsius scale.
Absolute zero is also precisely equivalent to; 0 degrees R on the Rankine scale (also a thermodynamic temperature scale); and –459.67 degrees F on the Fahrenheit scale.
When a metal IS in an extreme cold state it can become brittle. Slowly dropping a metals temperature down to liquid nitrogen temps, leaving them there and slowly raising them increases their durability. It's a process used a lot in high performance automotive parts. It's called "Cryogenic Processing" or "Cryogenic Treatment" and the science is fascinating. You should look it up if you get some free time.