When it comes to sword materials, there are several that are known for their strength and durability. Here are a few notable ones:

1. High-Carbon Steel: High-carbon steel is a popular material for swords due to its strength and ability to hold a sharp edge. It contains a higher percentage of carbon than regular steel, which contributes to its hardness and toughness. Different types of high-carbon steel, such as 1095 or 5160, are commonly used in sword making.
2. Tool Steel: Tool steel is another strong and durable material used in sword production. It is designed to withstand high impact and resist deformation. Tool steels like S7, O1, or D2 are often utilized for making blades that require exceptional strength.
3. Stainless Steel: While stainless steel is not as strong as high-carbon or tool steel, it offers excellent corrosion resistance. Stainless steel swords are favored for their low maintenance requirements and resistance to rust. Various types of stainless steel alloys, such as 440C or VG-10, are commonly used in sword construction.
4. Damascus Steel: As mentioned earlier, traditional Damascus steel, with its unique forging process, produced blades known for their strength and sharpness. While the original technique has been lost, modern interpretations using pattern welding or layered steel can still yield strong and visually appealing blades.

It's important to note that the overall strength of a sword depends on various factors, including the blade's design, heat treatment, and construction techniques. A well-crafted sword made from any of these materials, with proper forging and heat treatment, can result in a strong and reliable weapon. Additionally, factors like sword geometry, weight distribution, and the skill of the swordsmith also contribute to a sword's overall performance and durability.