diff --git a/package-lock.json b/package-lock.json
index f51b791101fc10..e00ad245d20c9f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18110,6 +18110,7 @@
 				"@wordpress/data": "file:packages/data",
 				"@wordpress/date": "file:packages/date",
 				"@wordpress/deprecated": "file:packages/deprecated",
+				"@wordpress/dom": "file:packages/dom",
 				"@wordpress/element": "file:packages/element",
 				"@wordpress/hooks": "file:packages/hooks",
 				"@wordpress/html-entities": "file:packages/html-entities",
diff --git a/packages/editor/package.json b/packages/editor/package.json
index 0fb5506b6e05c2..288a0d427b582f 100644
--- a/packages/editor/package.json
+++ b/packages/editor/package.json
@@ -42,6 +42,7 @@
 		"@wordpress/data": "file:../data",
 		"@wordpress/date": "file:../date",
 		"@wordpress/deprecated": "file:../deprecated",
+		"@wordpress/dom": "file:../dom",
 		"@wordpress/element": "file:../element",
 		"@wordpress/hooks": "file:../hooks",
 		"@wordpress/html-entities": "file:../html-entities",
diff --git a/packages/editor/src/components/post-title/index.js b/packages/editor/src/components/post-title/index.js
index 1092ee5959c0bd..b9143a29ff3c05 100644
--- a/packages/editor/src/components/post-title/index.js
+++ b/packages/editor/src/components/post-title/index.js
@@ -26,6 +26,7 @@ import {
 	insert,
 } from '@wordpress/rich-text';
 import { useMergeRefs } from '@wordpress/compose';
+import { __unstableStripHTML as stripHTML } from '@wordpress/dom';
 
 /**
  * Internal dependencies
@@ -166,7 +167,7 @@ function PostTitle( _, forwardedRef ) {
 				( firstBlock.name === 'core/heading' ||
 					firstBlock.name === 'core/paragraph' )
 			) {
-				onUpdate( firstBlock.attributes.content );
+				onUpdate( stripHTML( firstBlock.attributes.content ) );
 				onInsertBlockAfter( content.slice( 1 ) );
 			} else {
 				onInsertBlockAfter( content );
@@ -176,7 +177,10 @@ function PostTitle( _, forwardedRef ) {
 				...create( { html: title } ),
 				...selection,
 			};
-			const newValue = insert( value, create( { html: content } ) );
+			const newValue = insert(
+				value,
+				create( { html: stripHTML( content ) } )
+			);
 			onUpdate( toHTMLString( { value: newValue } ) );
 			setSelection( {
 				start: newValue.start,