Ever since steel was created, it has been the go to material for swords since antiquity and into the modern era (for actual replicas and not wall hangers). Of course while being effective it is also, subjectively, boring for a sci fi setting. Many other sci fi works have recognized this and have attempted to implement super metals into there future melee weapons.
Thus far, the only metal that can fits the futuristic vibe is Cemented tungsten carbide, as while it's technically a ceramic, cemented tungsten carbide does have some ductility in it making it for more durable than other ceramics. An example of it's use is in sci fi is Halo's Spiker which has two cemented tungsten carbide bayonets.
Now, while knives have been made out of cemented tungsten carbide exist, none of them are very long due to the difficulty of forging the material.
So assuming that we have figured out this problem how well would a cemented tungsten carbide sword hold up when compared to other materials like steel and bronze?
For the parameters of the question, we will assume the sword the tungsten carbide has been forged into a blade similar to late bronze/ early iron age designs like pictured below.
This picture depicts bronze age swords which are around 50cm to 70cm long (assuming the ruler is in centimeters). This depicts swords from the iron age and are around the same length as the bronze swords as mentioned above.
EDIT: As many of you pointed out, the material of the knife is cemented tungsten carbide, not tungsten carbide itself. I've corrected the mistake. As for the question for the question of cemented carbide swords, this question is specifically asking for the performance of cemented tungsten carbide only, not any other cemented material.