Disarm effect

Disarms are crowd control effects that remove the target's main hand weapon for a short time. Player-caused Disarms also remove the target's off hand weapon or shield if equipped. This has the effect of lowering the target's damage, and prevents abilities that require a weapon equipped from being used. All player-caused disarm effects are subject to diminishing returns.

Disarm Abilities
Disarms are only available from Honor talents, and cannot be used when the player is not engaged in PvP.
 * Disarm
 * Dismantle
 * Faerie Swarm
 * Grapple Weapon

History
Disarm-resistance mechanics were changed in Patch 2.3.0 and later in Patch 4.0.6. Previously, a number of items and some talents provided immunity to disarm. These have all been changed to reducing the duration of disarm effects by 60% and later on 50%.

At the time, all player-caused disarm effects were removed in patch 6.0.2. Player abilities with disarm effects included Psychic Horror (priest), Disarm (warrior), Dismantle (rogue) and Ring of Peace (monk).

Counters

 * A weapon chain can be attached to a melee weapon, reducing the duration of disarm effects by 50%. These appear as a small white spark spinning around the weapon. They are considered permanent item augments, and attaching one will replace any other permanent augments currently on the weapon (including enchants).
 * Certain items (such as Death Grips) have this same ability without needing to be enchanted.