Damage conversion changes one damage type into another, like Strike -> Lightning
It does this, before any damage multipliers are applied.
When converted, damage adopts the Base Factor and % Damage Bonus of its new type — it does not keep bonuses from its original type. As such there is no "double dipping".


Example:
Without conversion

• 100 Strike Damage
  
• Base Factor (Fitness): 1.28
  
• Strike Damage Bonus: +90%
  

  = 100 × 1.28 × (1 + 0.90) = 243.2

If converted to Lightning:

• 100 Lightning Damage
  
• Base Factor (Cunning): 1.16
  
• Lightning Damage Bonus: +39%
  

  = 100 × 1.16 × (1 + 0.39) = 161.24

Damage conversion in Titan Quest 2 comes from two sources: local or global.
Understanding the difference is key, since local conversions always take priority over global ones.


A local conversion happens when a skill or skill modifier specifies the conversion directly.
It only affects that skill’s initial damage/effect, and does not carry over to other skills (or even modifiers on the same skill) unless explicitly stated.

Examples:

• Fissure: Spikes → 100% Hit Damage converted to Pierce
  
  • Will not convert Lava Fissure's Fire Damage
  
  
• Primary Attack: Fire Explosion → 100% Damage converted to Fire
  
  • Will not convert Fragmentation's On Hit: Pierce Damage
  
  
• Lightning Bolt → 120% Weapon Damage dealt as Lightning
  
  
• Mark for Death → 10% of the Hit dealt as Vitality

A global conversion comes from Sustained skills or Passive feats.
They can apply to multiple skills, but often only to those referenced appropriately (e.g. 100% Weapon Damage conversion with “Attack” or “% Weapon Damage” tagged skills).

Examples:

• Preparation: Envenom → 100% Weapon Damage converted to Poison
  
  
• Ring of Flame: Blazing Weapons → 100% Weapon Damage converted to Fire

Some conversions are restricted by conditions. These will only apply within their clause.

Local
• Grenade → Poison Grenade: 100% Damage of Explosion and Burning Ground Damage converted to Poison
  
  • Will not convert Fragmentation's Pierce Damage

Global
• Volatile Concoction → Shadow Spell: 100% Damage of Shadow Spells converted to Fire
  
  • Will not convert Lethal Strike's Poison Explosion

Instances of this conversion:

• Primary Attack: Fire Explosion: 100% Damage converted to Fire Damage
  
• Grenade: Poison Grenade: 100% Damage of explosion and Burning Ground converted to Poison Damage
  

The rules of this conversion:

• Affects only the skill’s direct damage, not independent sources of damage, or already locally handled conversions
  
• Converts all damage into the new type. E.g. 23 Fire → 23 Poison

For “Attack” or “% Weapon Damage” tagged skills:

• Converts the weapon’s base damage.
  
  
• Converts +X Weapon Damage from items/skills (e.g. Vitality Drain, Stone Imbuement, Weapon Coating).

Note: Useful for focusing into a single damage type and scaling it, but comes at the cost of losing variety.





Ex.
Bow:
35-39 Pierce
• +5 Weapon Cold Damage
• +2 Weapon Fire Damage

• Base Factor (Resolve): 1.28
  
• Fire Damage Bonus: +89%
  • 100% Damage Converted to Fire

---

Common on Sustained skills like Storm Nimbus, Earth Enchantment, Preparation.
Applies to all “Attack” tagged skills or skills using “% Weapon Damage.”

• Applies to the weapon’s white number base damage only.
  
• Does not convert "+X Weapon Damage" from items/skills — those keep their original type.
  
• Does not affect modifiers with independent damage procs.

Note: Good when you still want to preserve bonus damage types (+X Weapon Vitality, etc.) for utility effects like lifesteal.









Example –build:
• Base Factor (Resolve): 1.27
• Cold Damage Bonus: +0%
• Fire Damage Bonus: +40%

Staff:
28-30 Cold
• +6 Weapon Cold Damage
• +3 Weapon Fire Damage

When multiple conversions exist, the rules differ based on type.

• Multiple “100% Damage → X” sources split evenly into a pool of 100.
  
  
  • 2 sources = 50% each
    
    
  • 3 sources = ~33% each
    
    
  • 4 sources = 25% each
  
  
• Each split portion is scaled by its own damage type bonuses.
  
  
• On hit, multiple damage types are dealt simultaneously.

Example –4 x 100% Damage Converted to (Fire, Poison, Pierce, Strike):

• 100% Damage converted to Fire Damage (Fire Explosion)
  
• 100% Damage converted to Poison Damage (Toxicity)
  
• 100% Damage converted to Pierce Damage ( Fragmentation)
  
• 100% Damage converted to Strike Damage ( Heavy Impact)

157 Damage

Physical Damage Bonuses:
• Base Factor (Fitness): 1.65
  
• Strike Damage: +78%
  
• Pierce Damage: +108%
  
  Thermic Damage Bonuses:
  
• Base Factor (Resolve): 1.39
  
• Fire Damage Bonus: +78%
  
• Cold Damage Bonus: +78%
  
  Natural Damage Bonuses
  
• Base Factor (Cunning): 1.42
  
• Lightning Damage: +78%
  
• Poison Damage: +78%
  

---

• Local “100% Damage → X” always overrides any “100% Weapon Damage → X.”
  
  
• The Weapon Damage conversion is ignored for that skill if a full Damage conversion exists.

Example:

• Preparation → Blade Honing: 100% Weapon Damage → Pierce (Global)
  
• Primary Attack → Fire Explosion: 100% Damage → Fire (Local)

Result =100% Fire

---

• Two “100% Weapon Damage → X” of different types = split 50% each.
  
  
• Each type scales with its respective damage bonuses.
  
  
• On hit, you deal multiple types, but:
  
  • For ailments, the game chooses one type to apply — not both.

Currently, if your weapon has no flat +X Weapon Damage value, that type can be removed when two full (100%) Weapon Damage conversions are applied.

Example – Cold damage disappearing

1. Staff: 32–36 Cold Damage
   
2. Storm Nimbus: 100% Weapon Damage → Cold
   
3. Earth Enchantment: 100% Weapon Damage → Fire

In this case, your Cold damage is completely overwritten by the Fire conversion. You will no longer be dual damage type. This missing damage type, will result in a loss in damage.