Every material grade has a certain number of swings it would take for a weapon of that material to degrade from 100% condition to 70% condition. Below 70%, the weapon (and ditto for the armor) cannot get worse in performance.
From the lowest number of swings to the highest, the materials are:
- Fine Alloy
The damage dealt is not a factor in how quickly the weapon wears out. Faster weapons do have more condition points than slow ones, so that weapons made of the same material will wear out at the same speed regardless of speed. A weapon with a color con too high for your level will wear out at a faster rate than the standard.
Armor is treated differently, instead of changing the Condition based on speeds, a whole set divides up the base condition points based on how much coverage a piece supplies to the body. The torso piece covers 25% of the body, and gets 25% of the condition points. Each time your torso is struck, including times that it completely absorbs the blow and it is displayed as a miss, you will lose the same points that a weapon loses when it swings.
One wrinkle that gets thrown in here is that Condition does not go down in a linear fashion. When half of the Condition points are remaining, the displayed Con would be 90%. The numbers slope off from there.
Now, when it comes time to repair, each item has durability points. To take an item from completely fried to its maximum points requires a certain number of its Durability points. To repair a bronze item takes many more points from durability than asterite.
The amount of Durability removed is based on the proportion of Condition restored to the maximum condition of the object.
The REAL point to all this is that it is always in your best interest to purchase player made goods, even if the cost seems higher initially.