diff --git a/TUI.Test/BorderElementRenderTests.cs b/TUI.Test/BorderElementRenderTests.cs
index bd91f53..325f94e 100644
--- a/TUI.Test/BorderElementRenderTests.cs
+++ b/TUI.Test/BorderElementRenderTests.cs
@@ -206,4 +206,28 @@ public void TitleIsSuppressedWhenTheBorderIsTooNarrow()
 		// Assert
 		Assert.IsEmpty(provider.WritesOf(" Title "));
 	}
+
+	/// <summary>
+	/// A title containing a line break stays on the top border row: no write carries the break to
+	/// the terminal, and each break is drawn as a space (ktsu-dev/TUI#151).
+	/// </summary>
+	/// <param name="title">The title under test.</param>
+	[TestMethod]
+	[DataRow("ab\ncd")]
+	[DataRow("ab\rcd")]
+	[DataRow("ab\r\ncd")]
+	public void TitleWithALineBreakIsDrawnOnOneRow(string title)
+	{
+		// Arrange
+		BorderElement element = CreateElement(width: 12, height: 4);
+		element.Title = title;
+		RecordingConsoleProvider provider = new();
+
+		// Act
+		element.Render(provider);
+
+		// Assert
+		Assert.IsFalse(provider.Writes.Any(w => w.Text.Contains('\r') || w.Text.Contains('\n')), "A write carried a line break");
+		Assert.AreEqual(0, provider.WritesOf(" ab cd ").Single().Position.Y);
+	}
 }
diff --git a/TUI/Elements/Primitives/BorderElement.cs b/TUI/Elements/Primitives/BorderElement.cs
index 20ef551..c318779 100644
--- a/TUI/Elements/Primitives/BorderElement.cs
+++ b/TUI/Elements/Primitives/BorderElement.cs
@@ -150,7 +150,11 @@ protected override void OnRender(IConsoleProvider provider)
 		if (!string.IsNullOrEmpty(Title) && dimensions.Width > 4)
 		{
 			int maxTitleWidth = dimensions.Width - 4; // Leave space for border and padding
-			string displayTitle = Title.Length > maxTitleWidth ? Title[..maxTitleWidth] : Title;
+
+			// A line break written to the terminal would move the rest of the title off the top
+			// border row and over the left edge, so each break becomes a space (ktsu-dev/TUI#151).
+			string singleLineTitle = Title.Replace("\r\n", " ", StringComparison.Ordinal).Replace('\r', ' ').Replace('\n', ' ');
+			string displayTitle = singleLineTitle.Length > maxTitleWidth ? singleLineTitle[..maxTitleWidth] : singleLineTitle;
 			string titleWithPadding = $" {displayTitle} ";
 
 			int titleX = TitleAlignment switch