diff --git a/Kiwano/2d/ActionHelper.h b/Kiwano/2d/ActionHelper.h
index 5e1ad8b4..3e8ac5be 100644
--- a/Kiwano/2d/ActionHelper.h
+++ b/Kiwano/2d/ActionHelper.h
@@ -46,9 +46,9 @@ namespace kiwano
 		inline ActionHelper& SetName(String const& name)					{ base->SetName(name); return (*this); }
 
 		// 获取指针
-		inline ActionPtr Get() const									{ return base; }
+		inline ActionPtr Get() const										{ return base; }
 
-		inline ActionHelper(ActionPtr base)							: base(base) {}
+		inline ActionHelper(ActionPtr base)									: base(base) {}
 
 		inline operator ActionPtr() const									{ return base; }
 
@@ -154,15 +154,9 @@ namespace kiwano
 		}
 
 		static inline TweenHelper
-			OpacityBy(float opacity)
+			FadeTo(float opacity)
 		{
-			return TweenHelper(new kiwano::ActionOpacityBy(0, opacity));
-		}
-
-		static inline TweenHelper
-			OpacityTo(float opacity)
-		{
-			return TweenHelper(new kiwano::ActionOpacityTo(0, opacity));
+			return TweenHelper(new kiwano::ActionFadeTo(0, opacity));
 		}
 
 		static inline TweenHelper
@@ -232,6 +226,21 @@ namespace kiwano
 #pragma warning(push)
 #pragma warning(disable : 4996)
 
+		KGE_DEPRECATED("Tween::OpacityBy has been removed, use Tween::FadeTo instead")
+		static inline TweenHelper
+			OpacityBy(float opacity)
+		{
+			KGE_ASSERT("Tween::OpacityBy has been removed, use Tween::FadeTo instead");
+			return TweenHelper(nullptr);
+		}
+
+		KGE_DEPRECATED("Tween::OpacityTo is deprecated, use Tween::FadeTo instead")
+		static inline TweenHelper
+			OpacityTo(float opacity)
+		{
+			return TweenHelper(new kiwano::ActionFadeTo(0, opacity));
+		}
+
 		KGE_DEPRECATED("Tween::Sequence is deprecated, use Tween::Group instead")
 		static inline ActionHelper
 			Sequence(Array<ActionPtr> const& actions)
diff --git a/Kiwano/2d/ActionTween.cpp b/Kiwano/2d/ActionTween.cpp
index 13fd5e1a..21804465 100644
--- a/Kiwano/2d/ActionTween.cpp
+++ b/Kiwano/2d/ActionTween.cpp
@@ -326,59 +326,39 @@ namespace kiwano
 	// Opacity Action
 	//-------------------------------------------------------
 
-	ActionOpacityBy::ActionOpacityBy(Duration duration, float opacity, EaseFunc func)
+	ActionFadeTo::ActionFadeTo(Duration duration, float opacity, EaseFunc func)
 		: ActionTween(duration, func)
-		, delta_val_(opacity)
+		, delta_val_(0.f)
+		, end_val_(opacity)
 	{
 	}
 
-	void ActionOpacityBy::Init(NodePtr target)
+	void ActionFadeTo::Init(NodePtr target)
 	{
 		if (target)
 		{
 			start_val_ = target->GetOpacity();
+			delta_val_ = end_val_ - start_val_;
 		}
 	}
 
-	void ActionOpacityBy::UpdateTween(NodePtr target, float percent)
+	void ActionFadeTo::UpdateTween(NodePtr target, float percent)
 	{
 		target->SetOpacity(start_val_ + delta_val_ * percent);
 	}
 
-	ActionPtr ActionOpacityBy::Clone() const
+	ActionPtr ActionFadeTo::Clone() const
 	{
-		return new (std::nothrow) ActionOpacityBy(dur_, delta_val_, ease_func_);
-	}
-
-	ActionPtr ActionOpacityBy::Reverse() const
-	{
-		return new (std::nothrow) ActionOpacityBy(dur_, -delta_val_, ease_func_);
-	}
-
-	ActionOpacityTo::ActionOpacityTo(Duration duration, float opacity, EaseFunc func)
-		: ActionOpacityBy(duration, 0, func)
-	{
-		end_val_ = opacity;
-	}
-
-	ActionPtr ActionOpacityTo::Clone() const
-	{
-		return new (std::nothrow) ActionOpacityTo(dur_, end_val_, ease_func_);
-	}
-
-	void ActionOpacityTo::Init(NodePtr target)
-	{
-		ActionOpacityBy::Init(target);
-		delta_val_ = end_val_ - start_val_;
+		return new (std::nothrow) ActionFadeTo(dur_, end_val_, ease_func_);
 	}
 
 	ActionFadeIn::ActionFadeIn(Duration duration, EaseFunc func)
-		: ActionOpacityTo(duration, 1, func)
+		: ActionFadeTo(duration, 1, func)
 	{
 	}
 
 	ActionFadeOut::ActionFadeOut(Duration duration, EaseFunc func)
-		: ActionOpacityTo(duration, 0, func)
+		: ActionFadeTo(duration, 0, func)
 	{
 	}
 
diff --git a/Kiwano/2d/ActionTween.h b/Kiwano/2d/ActionTween.h
index 5c671a9c..272de038 100644
--- a/Kiwano/2d/ActionTween.h
+++ b/Kiwano/2d/ActionTween.h
@@ -296,40 +296,12 @@ namespace kiwano
 	};
 
 
-	// 透明度相对渐变动作
-	class KGE_API ActionOpacityBy
+	// 透明度渐变动作
+	class KGE_API ActionFadeTo
 		: public ActionTween
 	{
 	public:
-		ActionOpacityBy(
-			Duration duration,		/* 持续时长 */
-			float opacity,			/* 相对变化值 */
-			EaseFunc func = nullptr	/* 速度变化 */
-		);
-
-		// 获取该动作的拷贝对象
-		ActionPtr Clone() const override;
-
-		// 获取该动作的倒转
-		ActionPtr Reverse() const override;
-
-	protected:
-		void Init(NodePtr target) override;
-
-		void UpdateTween(NodePtr target, float percent) override;
-
-	protected:
-		float start_val_;
-		float delta_val_;
-	};
-
-
-	// 透明度渐变动作
-	class KGE_API ActionOpacityTo
-		: public ActionOpacityBy
-	{
-	public:
-		ActionOpacityTo(
+		ActionFadeTo(
 			Duration duration,		/* 持续时长 */
 			float opacity,			/* 目标值 */
 			EaseFunc func = nullptr	/* 速度变化 */
@@ -341,21 +313,25 @@ namespace kiwano
 		// 获取该动作的倒转
 		virtual ActionPtr Reverse() const override
 		{
-			KGE_ERROR_LOG(L"Reverse() not supported in ActionOpacityTo");
+			KGE_ERROR_LOG(L"Reverse() not supported in ActionFadeTo");
 			return nullptr;
 		}
 
 	protected:
 		void Init(NodePtr target) override;
 
+		void UpdateTween(NodePtr target, float percent) override;
+
 	protected:
+		float start_val_;
+		float delta_val_;
 		float end_val_;
 	};
 
 
 	// 淡入动作
 	class KGE_API ActionFadeIn
-		: public ActionOpacityTo
+		: public ActionFadeTo
 	{
 	public:
 		// 创建淡入动作
@@ -368,7 +344,7 @@ namespace kiwano
 
 	// 淡出动作
 	class KGE_API ActionFadeOut
-		: public ActionOpacityTo
+		: public ActionFadeTo
 	{
 	public:
 		// 创建淡出动作
diff --git a/Kiwano/2d/include-forwards.h b/Kiwano/2d/include-forwards.h
index 043ff7f3..9fdb85b0 100644
--- a/Kiwano/2d/include-forwards.h
+++ b/Kiwano/2d/include-forwards.h
@@ -60,8 +60,7 @@ namespace kiwano
 	KGE_DECLARE_SMART_PTR(ActionJumpTo);
 	KGE_DECLARE_SMART_PTR(ActionScaleBy);
 	KGE_DECLARE_SMART_PTR(ActionScaleTo);
-	KGE_DECLARE_SMART_PTR(ActionOpacityBy);
-	KGE_DECLARE_SMART_PTR(ActionOpacityTo);
+	KGE_DECLARE_SMART_PTR(ActionFadeTo);
 	KGE_DECLARE_SMART_PTR(ActionFadeIn);
 	KGE_DECLARE_SMART_PTR(ActionFadeOut);
 	KGE_DECLARE_SMART_PTR(ActionRotateBy);