ttlafterfinish to beta

content/en/docs/concepts/workloads/controllers/ttlafterfinished.md

@@ -8,17 +8,17 @@ weight: 70
 
 <!-- overview -->
 
-{{< feature-state for_k8s_version="v1.12" state="alpha" >}}
+{{< feature-state for_k8s_version="v1.21" state="beta" >}}
 
 The TTL controller provides a TTL (time to live) mechanism to limit the lifetime of resource
 objects that have finished execution. TTL controller only handles
 {{< glossary_tooltip text="Jobs" term_id="job" >}} for now,
 and may be expanded to handle other resources that will finish execution,
 such as Pods and custom resources.
 
-Alpha Disclaimer: this feature is currently alpha, and can be enabled with both kube-apiserver and kube-controller-manager
+This feature is currently beta and enabled by default, and can be disabled via 
 [feature gate](/docs/reference/command-line-tools-reference/feature-gates/)
-`TTLAfterFinished`.
+`TTLAfterFinished` in both kube-apiserver and kube-controller-manager.
 
 <!-- body -->